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how can I prove the system $\dot{x}=AX$ is not positive if $A$ is not a Meltzer matrix

QUESTION FROM: ‪omer katz‬‏ | 47 minutes ago
Algebra, Equation Solving
0
REPLIES
13
VIEWS

Plot audio data from a dual (stereo) channel file?

QUESTION FROM: Motilal khoirom | 4 hours ago BY: Adam Cherad
Mathematics, Audio, Sound and Music, Signal Processing, ...
5
REPLIES
6K
VIEWS

Unable to state a simple square-well Schrödinger problem: "This system cannot be solved"

QUESTION FROM: Christer Gustafsson | 8 hours ago
Mathematics, Physics, Algebra, Equation Solving, ...
0
REPLIES
42
VIEWS

Ollama setup (post-it note instructions)

CONTRIBUTED BY: Cameron Kosina | 8 hours ago
Natural Language Processing
0
REPLIES
37
VIEWS

[WSS23] Efficient discovery of halting paths in aggregation system multiway graphs

CONTRIBUTED BY: Pietro Pepe | 14 hours ago BY: Pietro Pepe
Staff Picks, Wolfram Science, Computer Science, ...
2
REPLIES
2K
VIEWS

Uncovering new Halting Paths in Aggregation Systems

CONTRIBUTED BY: Pietro Pepe | 14 hours ago
Wolfram Science, Computer Science, Mathematics, ...
0
REPLIES
38
VIEWS

Does ROCFunctions "AUROC" switch categories to avoid AUC < 0.5

QUESTION FROM: Max Shpak | 16 hours ago BY: Jason Biggs
Data Science, Wolfram Language, Machine Learning
1
REPLIES
65
VIEWS

[WSG24] Daily Study Group: Introduction to electric circuits

CONTRIBUTED BY: Ankit Naik | 17 hours ago BY: Phil Earnhardt
Wolfram U
15
REPLIES
702
VIEWS

⭐ [R&DL] Wolfram R&D Developers on LIVE Stream

CONTRIBUTED BY: Charles Pooh | 18 hours ago BY: Keren Garcia
Staff Picks, Data Science, Education, Image Processing, ...
138
REPLIES
56K
VIEWS

Order 3 irreptiles

CONTRIBUTED BY: Ed Pegg | 18 hours ago BY: Moderation Team
Staff Picks, Mathematics, Geometry, ...
1
REPLIES
132
VIEWS

Using "// FullSimplify" with replace gives questionable answer

QUESTION FROM: Mitchell Sandlin | 19 hours ago BY: Gianluca Gorni
Mathematics, Wolfram Language
1
REPLIES
46
VIEWS

Visualizing 3D images of fruits and vegetables

CONTRIBUTED BY: Greg Hurst | 19 hours ago BY: Moderation Team
Staff Picks, Image Processing, ...
3
REPLIES
14K
VIEWS

Det::luc result for Det of badly conditioned matrix

QUESTION FROM: Cesar Lozada | 22 hours ago BY: Cesar Lozada
Mathematics, Algebra, Wolfram Language, ...
4
REPLIES
61
VIEWS

MultiaxisArrangement seems to break many plot options

QUESTION FROM: Jeff Burns | 1 day ago BY: Zhenyu Zeng
Graphics and Visualization, Wolfram Language
1
REPLIES
1K
VIEWS

[WSS23] Investigating LLM-agent interactions

CONTRIBUTED BY: Adrian Mladenić Grobelnik | 1 day ago BY: Adrian Mladenić Grobelnik
Staff Picks, Data Science, ...
3
REPLIES
2K
VIEWS

Air-traffic safety: the crash of the Germanwings flight 4U9525

CONTRIBUTED BY: Marco Thiel | 1 day ago BY: Moderation Team
Staff Picks, Data Science, Mathematica, Curated Data, ...
1
REPLIES
15K
VIEWS

Finite Markov chains and orthogonal polynomials

CONTRIBUTED BY: Manuel Mañas | 1 day ago BY: Christopher French
Staff Picks, Mathematics, Algebra, Wolfram Language, ...
2
REPLIES
393
VIEWS

A new irreptile by Vesa Timonen

CONTRIBUTED BY: Ed Pegg | 1 day ago BY: Moderation Team
Staff Picks, Mathematics, Dynamic Interactivity, ...
1
REPLIES
512
VIEWS

Time, radius and azimuthal angle dependent GEONs with discrete spherical energy levels

CONTRIBUTED BY: Wim Vegt | 2 days ago
Astronomy, Mathematics, Optics, Physics, ...
0
REPLIES
83
VIEWS

How do I tune my NDSolve code to start fast, so it can be run hundreds of times?

QUESTION FROM: Kaden Tro | 2 days ago BY: Gareth Russell
Mathematics, Physics, Calculus, Equation Solving, ...
3
REPLIES
238
VIEWS
1
2
3
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5

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FEATURED CONTRIBUTORS

Active Members
Ed Pegg
19 hours ago
Greg Hurst
9 months ago
Marco Thiel
3 months ago
Markus Roellig
2 days ago
Peter Young
3 days ago
Andrew Simoson
4 days ago
Anthony Zupnik
2 days ago
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