272 views

### Incompatible InterpolatingFunction between V9 (and earlier) and V10

Bug introduced in 10.0.0 and fixed in 10.0.1 I am encountering compatibility issues when loading DumpSave(d) definitions in V10 that have been created with earlier ...
273 views

### How does Hash calculate hash for strings?

I have this code Hash["a","SHA"] Hash[ToCharacterCode["a"],"SHA"] and I was expecting to get the same result, but somehow it is different. My question is: how ...
133 views

### Stabilized Inverted Pendulum Blog Post Broken in 12.0?

One of the old Wolfram blog posts that I use frequently is this demonstration of the LQR gains computation. https://blog.wolfram.com/2011/01/19/stabilized-inverted-pendulum/ I've been able to trust ...
156 views

### What is the logiс behind handling alpha-channel by various image-processing functions?

(Cross-posted on Wolfram Community.) When working on the answer to this question I discovered that starting from Mathematica 10.0 the behavior of such functions as ...
96 views

### A bug and inconsistency in current image arithmetic operations?

Let us start from a single-pixel RGBA image: i = Image[{{{0., .4, .7, .8}}}, Real, ColorSpace -> "RGB"]; Multiplying by .5 ...
352 views

### FindFaces in Mathematica 11.3

I just upgraded to Mathematica 11.3. but now my FindFaces instructions do not work anymore. I guess they changed the syntax in 11.3. Here is the original code: <...
68 views

### MatrixConditionNumber does not work in version 12.0

A = {{1., 0.}, {0., 2.}}; LinearAlgebraMatrixConditionNumber[A]
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### What has changed in PolyhedronData in V11

As we saw in: Demonstration site CDF error correction question PolyhedronData has changed. I've failed to find any information about how the syntax changed in V11....
231 views

### Is it safe to change the value of $TimeZone? I'd like to configure some of my notebooks to assume all calculations using dates, times and locations (notably AstronomicalData , but others too) take place at the ... 1answer 260 views ### MachinePrecision versus$MachinePrecision in NDSolve

I'd like to understand why one of these inputs gives me an error and the other doesn't: ...
98 views

### Problem with “MediaTools” in Mathematica 12

I asked here for a solution how single video images can be extracted very fast from avi files. Piotr Wendykier gave a solution for Mathematica 11.3. Now I'm using Mathematica 12 and his solution ...
126 views

### Solving system of differential equations in loop with recursive variable

Backslide introduced in 11.3, fixed in 12.0. I've been posting various questions about similar pieces of code all year, so if this looks familiar you may have seen another one of my posts, but this ...
110 views

### Mathematica 12 compatibility with earlier versions under macOS 10.15 Catalina [closed]

I currently run the following: Mathematica 10.3.0.0 on a Mac Pro (Late 2013)running macOS Mojave Version 10.14.6. I want to upgrade the OS to macOS 10.15 Catalina. To do so, I understand that ...
Total has been changed in Mathematica 12.0. The documentation seems to contradict itself. In one line it states: Total[ $f[ e_1,e_2,...]$ ] gives the sum of the $e_i$ for any head $f$ In the next ...