Group Abstract Group Abstract

«Groups
Numerical Computation
Join
Numeric equation solving, calculus and statistics, precision and accuracy control for numeric computations...

Discussions List Discussions List

The maximum output precision of InterpolatingFunction[]?

QUESTION FROM: 袁 旭龙 | 4 years ago BY: 袁 旭龙
Import and Export , Numerical Computation , Wolfram Language
8
REPLIES
5.1K
VIEWS

NMinimize "Function value is not a number" problem

QUESTION FROM: Riddhiman Sarkar | 4 years ago BY: Riddhiman Sarkar
Optimization , Mathematics , Numerical Computation , Wolfram Language
2
REPLIES
6.1K
VIEWS

Passing a numerical solution of an integral to NIntegrate?

QUESTION FROM: Alex B | 4 years ago BY: Michael Harrison
Calculus , Mathematics , Numerical Computation , Wolfram Language
1
REPLIES
5.8K
VIEWS

Solve the transcendental complex equation with Mathematica?

QUESTION FROM: Nam Nam | 4 years ago BY: Bill Nelson
Equation Solving , Mathematics , Numerical Computation , ...
5
REPLIES
5.3K
VIEWS

Integrate error: "The integrand has evaluated to non-numerical values..."

QUESTION FROM: Alex B | 4 years ago BY: Bill Nelson
Calculus , Mathematics , Numerical Computation , Wolfram Language
1
REPLIES
5.1K
VIEWS

Solve system of differential equations numerically?

QUESTION FROM: Alex B | 5 years ago BY: Hans Dolhaine
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
3
REPLIES
6.3K
VIEWS

NSolve and Solve run forever or give errors with big numbers

QUESTION FROM: Florent B | 5 years ago BY: Hans Dolhaine
Calculus , Equation Solving , Numerical Computation , ...
5
REPLIES
4.9K
VIEWS

[Solved] Plot of a numerical integration

QUESTION FROM: Ram Sen | 5 years ago BY: Ram Sen
Calculus , Mathematics , Numerical Computation , Wolfram Language
4
REPLIES
4.3K
VIEWS

How to numerical solve equation with 3x-integrals

QUESTION FROM: Toibjon Abdurahmonov | 5 years ago BY: Anonymous User
Algebra , Calculus , Equation Solving , Mathematics , ...
4
REPLIES
4.3K
VIEWS

System overdetermined

QUESTION FROM: Yesenia Tapia | 5 years ago BY: Hans Dolhaine
Equation Solving , Mathematics , Numerical Computation , Physics , ...
11
REPLIES
5K
VIEWS

Iterative function with powers

QUESTION FROM: Sam Rametse | 5 years ago BY: Bill Nelson
Equation Solving , Mathematics , Numerical Computation , ...
5
REPLIES
3.8K
VIEWS

Solve 6 non-linear equations for 6 variables not working

QUESTION FROM: Neerav Kaushal | 5 years ago BY: Daniel Lichtblau
Equation Solving , Mathematics , Numerical Computation , ...
3
REPLIES
5K
VIEWS

Numeric solution for Volterra equation

QUESTION FROM: James Win | 5 years ago BY: James Win
Equation Solving , Mathematics , Numerical Computation , ...
2
REPLIES
3.8K
VIEWS

How can I remove Internal precision error and get the better result?

QUESTION FROM: Mirza Farrukh Baig | 5 years ago BY: Gianluca Gorni
High-Performance Computing , Numerical Computation , Wolfram Language
5
REPLIES
8.3K
VIEWS

Numerical solution of multicomponent difussion in mineral

QUESTION FROM: Konstantin Solovev | 5 years ago BY: Konstantin Solovev
Earth Science , Graphics and Visualization , Mathematics , ...
7
REPLIES
8.1K
VIEWS

Abort calculation and get unfinished result

QUESTION FROM: Sebastian Neumann | 5 years ago BY: Daniel Lichtblau
Mathematica , Numerical Computation , Wolfram Language
3
REPLIES
4.2K
VIEWS

NSolve with conditions on complex solutions

QUESTION FROM: Mariam Tohari | 5 years ago BY: Mariam Tohari
Equation Solving , Mathematics , Numerical Computation , Optics , ...
4
REPLIES
7K
VIEWS

Fit data by combination of functions, solutions of differential eq.

QUESTION FROM: Hélène PASQUIER | 5 years ago BY: Hélène PASQUIER
Calculus , Chemistry , Equation Solving , Mathematics , ...
4
REPLIES
7.4K
VIEWS

Fitting different data sets with different models using FindFit

QUESTION FROM: Lorenzo Fuggiano | 5 years ago BY: Updating Name
Mathematics , Modeling , Numerical Computation , Signal Processing , ...
10
REPLIES
8.8K
VIEWS

Solve two differential equations with NDSolve and DSolve?

QUESTION FROM: Mauricio Cruz | 5 years ago BY: Mauricio Cruz
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
2
REPLIES
3.8K
VIEWS

Solving Boundary Value ODEs With Quasi-Linearization

QUESTION FROM: Frank Kampas | 6 years ago BY: Frank Kampas
Equation Solving , Graphics and Visualization , Mathematics , ...
5
REPLIES
5.6K
VIEWS

Issues with ContourPlot and Sinc functions?

QUESTION FROM: Jaime de la Mota | 6 years ago BY: Jaime de la Mota
Graphics and Visualization , Mathematics , Numerical Computation , ...
2
REPLIES
4.3K
VIEWS

[?] Avoid problem with Interpolation function for higher order derivatives?

QUESTION FROM: Rui Ma | 6 years ago BY: Daniel Lichtblau
Mathematics , Numerical Computation , Wolfram Language
3
REPLIES
5K
VIEWS

Use NIntegrate In parallel?

QUESTION FROM: Zheng Li | 6 years ago BY: Zheng Li
Mathematics , Numerical Computation , Wolfram Language
6
REPLIES
8.7K
VIEWS

Get the maximum for the following polynomial with conditions?

QUESTION FROM: xuxiang xu | 6 years ago BY: Daniel Lichtblau
Optimization , Mathematics , Numerical Computation , Wolfram Language
1
REPLIES
4.6K
VIEWS

Create a two body problem animation?

QUESTION FROM: Torebek Zhumabek | 6 years ago BY: Neil Singer
Calculus , Equation Solving , Graphics and Visualization , ...
2
REPLIES
5K
VIEWS

Compute sums containing Clebsch Gordan coefficients?

QUESTION FROM: Robert Poenaru | 6 years ago BY: Sjoerd Smit
Mathematics , Numerical Computation , Physics , Wolfram Language
1
REPLIES
7K
VIEWS

Avoid issue while using Mod[] in NDSolve[]?

QUESTION FROM: Maksym Snegirev | 6 years ago BY: Maksym Snegirev
Equation Solving , Mathematics , Numerical Computation , ...
2
REPLIES
5.1K
VIEWS

Get a numerical solution of an equation containing an integral?

QUESTION FROM: robby piscopo | 6 years ago BY: robby piscopo
Calculus , Mathematics , Numerical Computation , Wolfram Language
2
REPLIES
3.9K
VIEWS

Avoid problem using "Nested" NMaximize?

QUESTION FROM: Augusto Umaña | 7 years ago BY: Augusto Umaña
Optimization , Mathematics , Numerical Computation , Wolfram Language
3
REPLIES
5.5K
VIEWS

NDSolve laplacian equation on meshed boundary?

QUESTION FROM: Yahyaoui Hamza | 7 years ago BY: Tim Laska
Engineering , Equation Solving , Mathematics , Modeling , ...
1
REPLIES
6.5K
VIEWS

Compute the following integral with NIntegrate?

QUESTION FROM: S. Gallagher | 7 years ago BY: Michael Rogers
Mathematics , Numerical Computation , Wolfram Language
3
REPLIES
6.7K
VIEWS

Please speed up MRB constant program [open challenge]

QUESTION FROM: Marvin Ray Burns A.G.S. (cum laude) | 7 years ago BY: Marvin Ray Burns A.G.S. (cum laude)
Challenges , Mathematica , Mathematics , Numerical Computation , ...
3
REPLIES
10.3K
VIEWS

Solve the reduced three-body problem?

QUESTION FROM: thomas rialan | 7 years ago BY: Alexander Trounev
Astronomy , Equation Solving , Mathematics , Numerical Computation , ...
8
REPLIES
9.2K
VIEWS

Can interpolating functions be used in NMinimize constraints?

QUESTION FROM: Frank Kampas | 7 years ago BY: Frank Kampas
Optimization , Mathematics , Numerical Computation , Wolfram Language
5
REPLIES
6.9K
VIEWS

Question of NDSolve limitation: are there any major ones?

QUESTION FROM: Anonymous User | 7 years ago BY: Anonymous User
Equation Solving , Mathematics , Numerical Computation , ...
2
REPLIES
6.5K
VIEWS

Solve an ODE by NDSolve an Interpolating function

QUESTION FROM: Rafael López | 7 years ago BY: Anonymous User
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
8
REPLIES
11.7K
VIEWS

Evaluate the effect of changing a parameter of an equation with Manipulate?

QUESTION FROM: Tsukasa Oikawa | 7 years ago BY: Tsukasa Oikawa
Dynamic Interactivity , Equation Solving , ...
2
REPLIES
3.5K
VIEWS

Install Cuba Vegas package?

QUESTION FROM: Eleanor Crane | 7 years ago BY: Szabolcs Horvát
Compilation , Computer Science , External Programs and Systems , ...
3
REPLIES
11.1K
VIEWS

Use the Dirchelet Type B.C. for the 2D pde heat equation?

QUESTION FROM: Anthony Kalinowski | 7 years ago BY: Alexander Trounev
Equation Solving , Mathematics , Modeling , Numerical Computation , ...
1
REPLIES
5K
VIEWS

[?] Solve a system of coupled ODE's?

QUESTION FROM: Loic Sablon | 7 years ago BY: Loic Sablon
Equation Solving , Mathematics , Numerical Computation , ...
2
REPLIES
5.1K
VIEWS

Maximize values using a grid search?

QUESTION FROM: Sanghoon Cho | 7 years ago BY: Frank Kampas
Algebra , Calculus , Equation Solving , Optimization , Mathematics , ...
2
REPLIES
8.5K
VIEWS

Set Precision- digits and rationals?

QUESTION FROM: Zhehao Zhang | 7 years ago BY: Zhehao Zhang
Calculus , Mathematica , Mathematics , Numerical Computation , ...
2
REPLIES
6.7K
VIEWS

Accuarcy-Complex V11.3

QUESTION FROM: Zhehao Zhang | 7 years ago BY: Michael Rogers
Calculus , Computational Systems , Computer Science , Mathematica , ...
3
REPLIES
10.1K
VIEWS

[?] Calculate the volume of an exponentially distorted ellipsoid?

QUESTION FROM: Frank Kampas | 7 years ago BY: Mariusz Iwaniuk
Geometry , Mathematics , Numerical Computation , Wolfram Language
3
REPLIES
3.8K
VIEWS

Avoid this error "NDSolve::deqn: Equation or list of equations expected "?

QUESTION FROM: Ser Man | 7 years ago BY: Ser Man
Equation Solving , Mathematics , Numerical Computation , ...
5
REPLIES
8.3K
VIEWS

Get a more precise number of this formula with W|A?

QUESTION FROM: Michael Przybylski | 7 years ago BY: Michael Przybylski
Mathematics , Numerical Computation , Physics , Wolfram|Alpha
4
REPLIES
7.1K
VIEWS

Solve decoupled PDE's with NDSolve?

QUESTION FROM: Eric Smith | 7 years ago BY: Eric Smith
Equation Solving , Mathematics , Numerical Computation , ...
7
REPLIES
6.7K
VIEWS

What algorithm does NSolve use for real solutions of underdetermined system

QUESTION FROM: dbm368 | 7 years ago BY: Updating Name
Equation Solving , Mathematics , Numerical Computation , ...
11
REPLIES
9K
VIEWS

[?] Use CompositeQ[x]?

QUESTION FROM: Patrick Cesarano | 7 years ago BY: Ilian Gachevski
Mathematica , Mathematics , Numerical Computation , Wolfram Language
4
REPLIES
5.4K
VIEWS

[?] Perform optimization with a strange constraint?

QUESTION FROM: Ovunc Yilmaz | 7 years ago BY: Ovunc Yilmaz
Data Science , Engineering , Optimization , Mathematics , ...
2
REPLIES
12.2K
VIEWS

Use the numbers found in an optimization problem somewhere else?

QUESTION FROM: Ovunc Yilmaz | 7 years ago BY: Ovunc Yilmaz
Business Analytics , Optimization , Mathematics , ...
3
REPLIES
8.7K
VIEWS

[?] Size step is effectively zero?

QUESTION FROM: Jonas Hamp | 7 years ago BY: Daniel Lichtblau
Equation Solving , Mathematics , Numerical Computation , ...
1
REPLIES
7.5K
VIEWS

[?] Improve the results of NIntegrate - methods?

QUESTION FROM: Arny Toynbee | 7 years ago BY: Michael Rogers
Calculus , Mathematics , Numerical Computation , Physics , ...
3
REPLIES
9.9K
VIEWS

Solve a system of DAEs with discrete conditions using NDSolve?

QUESTION FROM: Foad Sojoodi Farimani | 8 years ago BY: Neil Singer
Discrete Mathematics , Engineering , Equation Solving , Mathematics , ...
4
REPLIES
7.7K
VIEWS

Calculate a numerical integration with NIntegrate?

QUESTION FROM: Giovanni Iacucci | 8 years ago BY: Gianluca Gorni
Equation Solving , Mathematics , Numerical Computation , ...
3
REPLIES
4.3K
VIEWS

[?] Understand significant digits?

QUESTION FROM: Nelson Zink | 8 years ago BY: Nelson Zink
Mathematics , Numerical Computation , Wolfram Language
3
REPLIES
5.6K
VIEWS

[?] Get the binary of negative integer numbers?

QUESTION FROM: Kui Chen | 8 years ago BY: Todd Rowland
Mathematics , Numerical Computation , Wolfram Language
1
REPLIES
11.2K
VIEWS

Find coordinates of an intersecting Line and Surface in 3D?

QUESTION FROM: Matthew Boraas | 8 years ago BY: Gianluca Gorni
Geometry , Graphics and Visualization , Mathematics , ...
1
REPLIES
5K
VIEWS

Improve speed to obtain numerical values of Bessel function?

QUESTION FROM: Markus Schmidt | 8 years ago BY: Markus Schmidt
Compilation , Discrete Mathematics , High-Performance Computing , ...
4
REPLIES
12K
VIEWS

[?] Round to x significant digits before printing it?

QUESTION FROM: David Kirkby | 8 years ago BY: David Kirkby
Mathematics , Numerical Computation , Wolfram Language
10
REPLIES
15.9K
VIEWS

[?] Figure out the problem from this Plot[]/Epilog/NSolve[] error message?

QUESTION FROM: Aeyoss Antelope | 8 years ago BY: Gianluca Gorni
Equation Solving , Graphics and Visualization , Mathematics , ...
2
REPLIES
8K
VIEWS

[?] Set WorkingPrecision in NIntegrate?

QUESTION FROM: Alexander Minakov | 8 years ago BY: Michael Rogers
Mathematics , Numerical Computation , Wolfram Language
3
REPLIES
7.9K
VIEWS

Sporadic convergence failure: “SingularValueDecomposition::cflsvd”

QUESTION FROM: John Sidles | 8 years ago BY: Kevin Slagle
Mathematics , Numerical Computation , Wolfram Language
5
REPLIES
6.7K
VIEWS

Find numbers with cubes?

QUESTION FROM: Alexey Podchufarov | 8 years ago BY: Alexey Podchufarov
Algebra , Discrete Mathematics , Mathematics , ...
3
REPLIES
7.2K
VIEWS

Solve a non-linear differential equations system?

QUESTION FROM: Gabriele Cinci | 8 years ago BY: Mariusz Iwaniuk
Biological Sciences , Calculus , Equation Solving , Mathematics , ...
10
REPLIES
13.4K
VIEWS

Create charts or animation of a Pursuit Curve?

QUESTION FROM: pawel kowalski | 8 years ago BY: pawel kowalski
Calculus , Demonstrations , Equation Solving , ...
4
REPLIES
11.8K
VIEWS

Writing a loop for multiple derivatives along roots for each derivative?

QUESTION FROM: Brandon Davis | 9 years ago BY: Okkes Dulgerci
Equation Solving , Mathematics , Numerical Computation , ...
5
REPLIES
5.9K
VIEWS

Solve system of equations with NSolve?

QUESTION FROM: Eft Rsd | 9 years ago BY: Gianluca Gorni
Equation Solving , Mathematics , Numerical Computation , ...
6
REPLIES
8.7K
VIEWS

Fibonnaci algorithm - explanation for syntax

QUESTION FROM: Tom Zinger | 9 years ago BY: Gianluca Gorni
Mathematics , Numerical Computation , Wolfram Language
1
REPLIES
6.4K
VIEWS

Fitting (x,y) data to model, with more weight at higher y values

QUESTION FROM: David Kirkby | 9 years ago BY: David Kirkby
Engineering , Modeling , Numerical Computation , Wolfram Language
5
REPLIES
9.2K
VIEWS

Interpolation for multi-dimensional functions

QUESTION FROM: Rene Samson | 9 years ago BY: Rene Samson
Discrete Mathematics , Mathematics , Numerical Computation , ...
10
REPLIES
19K
VIEWS

Can you understand this speed up to NSum?

QUESTION FROM: Marvin Ray Burns A.G.S. (cum laude) | 9 years ago BY: Daniel Lichtblau
Mathematica , Mathematics , Numerical Computation , Wolfram Language
1
REPLIES
5.5K
VIEWS

Finding Happy/Sad Numbers

QUESTION FROM: Anonymous User | 9 years ago BY: Eric Rimbey
Mathematics , Numerical Computation , Wolfram Language
14
REPLIES
9.2K
VIEWS

3D interpolation, memory problem?

QUESTION FROM: Artemiy Shamkin | 10 years ago BY: Sean Clarke
Optimization , Numerical Computation , Wolfram Language
2
REPLIES
6.3K
VIEWS

Efficient method to cyclically swap items in a list

QUESTION FROM: Paul Cleary | 10 years ago BY: Wiel Aerts
Data Science , Engineering , Mathematica , Optimization , ...
6
REPLIES
10.2K
VIEWS

Is there an upper limit to Solve?

QUESTION FROM: Paul Cleary | 10 years ago BY: Paul Cleary
Equation Solving , Mathematica , Mathematics , ...
2
REPLIES
5.3K
VIEWS

Out of Memory from Summation

QUESTION FROM: Jeff Albert | 10 years ago BY: Jeff Albert
High-Performance Computing , Numerical Computation , ...
2
REPLIES
4.8K
VIEWS

How Can I Solve A Stiff Boundary Value Problem In Mathematica 10?

QUESTION FROM: Marcolino R-M | 10 years ago BY: Marcolino R-M
Calculus , Equation Solving , Mathematica , Numerical Computation , ...
3
REPLIES
12.7K
VIEWS

Why does the author add ` backtick on the number?

QUESTION FROM: steve ma | 10 years ago BY: Bill Simpson
Numerical Computation , Wolfram Language
1
REPLIES
6.9K
VIEWS

Geodesics equation - solving and plotting via Mathematica

QUESTION FROM: michal buday | 10 years ago BY: Todd Rowland
Algebra , Calculus , Equation Solving , Geometry , ...
5
REPLIES
22.5K
VIEWS

"AccuracyGoal" and NDSolve

QUESTION FROM: Richard Dir | 10 years ago BY: Sean Clarke
Calculus , Numerical Computation , Wolfram Language
1
REPLIES
5.2K
VIEWS

LogLogPlot errors

QUESTION FROM: Leos Pohl | 10 years ago BY: Shenghui Yang
Graphics and Visualization , Mathematica , Numerical Computation
3
REPLIES
6.8K
VIEWS

Puzzled by FindClusters on a set of dates with a custom DistanceFunction

QUESTION FROM: David Reiss | 10 years ago BY: David Reiss
Data Science , Discrete Mathematics , Mathematica , Mathematics , ...
2
REPLIES
9.5K
VIEWS

Precision in NDSolve

QUESTION FROM: Francois Fayard | 10 years ago BY: Frank Kampas
Calculus , Equation Solving , Mathematica , Numerical Computation , ...
5
REPLIES
10.3K
VIEWS

Why the heat equation doesn't work with NDSolve?

QUESTION FROM: Jo R | 10 years ago BY: Jo R
Calculus , Equation Solving , Mathematica , Numerical Computation , ...
11
REPLIES
10.8K
VIEWS

Im having trouble making a few lines of code work within manipulate

QUESTION FROM: jethro holcroft | 10 years ago BY: Bruce Miller
Dynamic Interactivity , Graphics and Visualization , ...
2
REPLIES
11.8K
VIEWS

WhenEvent issue with vector valued diffeq

QUESTION FROM: David Keith | 11 years ago BY: David Keith
Calculus , Equation Solving , Mathematica , Numerical Computation , ...
4
REPLIES
8.3K
VIEWS

How do I tell the Base Conversion Calculator how many digits there are?

QUESTION FROM: Aaron Ingebrigtsen | 11 years ago BY: Aaron Ingebrigtsen
Mathematica , Numerical Computation , Wolfram Language
2
REPLIES
7.3K
VIEWS

error in N // Floor? (corrected version)

QUESTION FROM: Peter Quedens | 11 years ago BY: Ilian Gachevski
Mathematica , Numerical Computation , Wolfram Language
5
REPLIES
5.8K
VIEWS

Gauss iteration method-nestlist-stopping criteria

QUESTION FROM: selahittin cinar | 11 years ago BY: Daniel Lichtblau
Mathematica , Mathematics , Numerical Computation
4
REPLIES
4.8K
VIEWS

Setting global precision and decimals

QUESTION FROM: Anne-Claire Martines | 11 years ago BY: Anne-Claire Martines
Biological Sciences , Equation Solving , Mathematica , Modeling , ...
6
REPLIES
11.1K
VIEWS

Find k point that minimize the variance between the items in a numeric set

QUESTION FROM: david Bernard | 11 years ago BY: Daniel Lichtblau
Mathematica , Optimization , Numerical Computation , Wolfram Language
4
REPLIES
3.6K
VIEWS

Portfolio Optimization - FindMinimum vs NMinimize

QUESTION FROM: Tim Mayes | 11 years ago BY: Frank Kampas
Finance , Mathematica , Optimization , Numerical Computation , ...
3
REPLIES
8.6K
VIEWS

FindMinimum Variable Independence Puzzle

QUESTION FROM: Frank Kampas | 11 years ago BY: Frank Kampas
Optimization , Numerical Computation , Wolfram Language
2
REPLIES
2.6K
VIEWS

Navier–Stokes equations

QUESTION FROM: sa sa | 11 years ago BY: Vitaliy Kaurov
Numerical Computation , Wolfram Language
1
REPLIES
5.5K
VIEWS

loading NonlinearModelFit in Mathematica 6

QUESTION FROM: mark hixon | 11 years ago BY: Frank Kampas
Mathematica , Modeling , Numerical Computation , Wolfram Language
3
REPLIES
4.1K
VIEWS

Stochastic root finding with Mathematica

QUESTION FROM: Szabolcs Horvát | 11 years ago BY: Szabolcs Horvát
Mathematica , Numerical Computation , Statistics and Probability , ...
2
REPLIES
4.4K
VIEWS

solving a set of algebraic equations

QUESTION FROM: nirupama radhakrishnan | 11 years ago BY: Bruce Miller
Algebra , Numerical Computation , Wolfram|Alpha , Wolfram Language
2
REPLIES
7.7K
VIEWS

NIntegrate failed to converge

QUESTION FROM: Scott Shaw | 11 years ago BY: Bill Simpson
Chemical Engineering , Mathematica , Numerical Computation , ...
1
REPLIES
18.4K
VIEWS
3
4
5
6
7

Group Count Group Count

1273 Discussions

Group Branding Group Branding

New Discussion New Discussion

ACTIVE MEMBERS ACTIVE MEMBERS

ACTIVE MEMBERS
binoushousam
Housam Binous
2 days ago
mkafker
Matthew Kafker
8 days ago
rowland
Todd Rowland
9 days ago
brunot
Bruno Tenorio
10 days ago
russell
Gareth Russell
8 days ago
akram2007omar
Akram Masoud
11 days ago
ankitn
Ankit Naik
19 days ago

RELATED GROUPS RELATED GROUPS

RELATED GROUPS
Wolfram Language 11K discussions 2K subscriptions
Graphics and Visualization 4K discussions 1K subscriptions
Symbolic Computations 890 discussions 728 subscriptions
Modeling 735 discussions 1K subscriptions
Engineering 649 discussions 1K subscriptions
Chemistry 330 discussions 760 subscriptions