# User Portlet

Discussions |
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Obviously the new triangles are not complanar with the plane of the very first triangle. Therefore you look *through*. If you could convince yourself to ease things as much as possible you would - first transform your very first triangle into a... |

They are quite visible on the tool bar behind a button `Palettes` like that ![Palettes][1] [1]: http://community.wolfram.com//c/portal/getImageAttachment?filename=palette.PNG&userId=28832 |

Yes, but, with Clear[f1, f11, fL] f1[x_] := -(ArcTan[(1 + 2 x)/Sqrt[3]]/Sqrt[3]) - 1/3 Log[-1 + x] + 1/6 Log[1 + x + x^2] f11[x_] := -(ArcTan[(1 + 2 x)/Sqrt[3]]/Sqrt[3]) - 1/3 Log[1 - x] + 1/6 Log[1 + x + x^2] fL[x_] :=... |

What about taking a limit? In[9]:= FullSimplify[(x^p + 2^p)^(1/p), p 0] Out[10]= 0 |

Have a look into [Tensor on a vector space][1], especially at the end $T^{0,q}(f)=T^{q,0}(f^{*})^{-1}$. To take $A^{ijkl}B_{klmn} = \delta^{i}_m \delta^{j}_{n}$ serious you could check out [Tensors][2] and [Tensors Tutorial][3] as well as... |

> we probably need some statistics beyond the usual anecdotes. The [TIOBE Index for May 2016][1] sees $Mathematica$ on a place 50+. It is a programming community index. If we concede that Nobel Laureats as well as Fields Medallists ... and Mr... |

You cannot fix it (recompilation) without being the owner or maintainer of the source code. In Mathematica 10.4.1.0 (Win 10 Prof 64 Bit) it works In[1]:= {{0, 0}, {0.5, 0}, {1, 0}, {1, 1}, {0, 1}}, "BoundaryElements" ->... |

In[2]:= DSolve[{y'[x] == x*Log[x], y[1] == 1}, y[x], x] Out[2]= {{y[x] -> 1/4 (5 - x^2 + 2 x^2 Log[x])}} In[3]:= Dimensions[%] Out[3]= {1, 1} and that works In[5]:= Clear[a] a = DSolve[{y'[x] == x*Log[x], y[1] ==... |

It looks like a vector plot here (Mathematica 10.4.1.0 Windows 10 Prof 2^6 Bit) Show[{VectorPlot[Normalize[{y, -8 y - 7 x}], {x, -3, 3}, {y, -3, 3}, VectorPoints -> 14, VectorStyle -> Arrowheads[0.015], VectorScale ->... |

I need to know how to find the centroid and moment of inertia of such solid. It tends to become numerical, so have a look at [MeshCellCentroid][1], [LaminaData][2], [RegionCentroid][3], [MomentOfInertia][4], [RegionMoment][5] and come up with... |