Consider the following code
zx = Table[Tan[7/9 (i + j)], {i, 100}, {j, 100}]; Eigenvalues[N[zx]] Every time I run this code I get new sets of eigenvalues. Can anyone tell why this is happening?
$\begingroup$ $\endgroup$
7 
- 3$\begingroup$ there is nothing random in your code. So for same input, the output should be the same. Can't reproduce. Try with clean Kernel? Can you show a screen shot showing 2 runs and they produce different output? !Mathematica graphics $\endgroup$Nasser– Nasser2018-04-25 04:59:10 +00:00Commented Apr 25, 2018 at 4:59
- $\begingroup$ Thanks for the comment. $\endgroup$BBB– BBB2018-04-25 05:27:28 +00:00Commented Apr 25, 2018 at 5:27
- $\begingroup$ Please find the screenshot at [link] (imgur.com/ILWuR0K) $\endgroup$BBB– BBB2018-04-25 05:28:08 +00:00Commented Apr 25, 2018 at 5:28
- 5$\begingroup$ it seems there was a bug in version 7.0. Can't find exact reference, but googling around there are some threads that talk about problems with eigenvalues/eigenvector in version 7. So I am sure this was a bug. But it is fixed now. It is always a good idea to mention which version you are using. Version 7 is 10 years old. This is like a century in human life. You might want to upgrade if you can. $\endgroup$Nasser– Nasser2018-04-25 05:44:53 +00:00Commented Apr 25, 2018 at 5:44
- $\begingroup$ Thank you very much for your comment $\endgroup$BBB– BBB2018-04-25 06:08:52 +00:00Commented Apr 25, 2018 at 6:08
| Show 2 more comments