coeff = matrix(QQ, [[-7, -6, -12], [5, 5, 7], [1, 0, 4]])
NameError Traceback (most recent call last) Cell In[1], line 1 ----> 1 coeff = matrix(QQ, [[-7, -6, -12], 2 [5, 5, 7], 3 [1, 0, 4]])
NameError: name 'matrix' is not defined
What to do?
It works for me with SageMath 10.2. Are you sure you are running a SageMath kernel and not a Python kernel? If yes, please describe your version of SageMath, your OS and how you have installed SageMath.
Version: Sage 10.2. OS: macOS Sonoma 14.2.1. Sage installed via home-brew - worked fine. The above script runs first ok using Jupiter lab, and it runs ok using Sage interactive terminal. But now no more using Jupiter ..
Obviously I run (now) a Python kernel. Q: how to change kernel from Python3 -> SageMath kernel?
I solved the problem by brute force: uninstall Sage-10.2 and install a new version Sage-10.2.app. Using also the recommended surplus package now gives the choice in the JupiterLab (button RHS above) to choose between different kernels, a Python3 kernel.. and a Sage-10.2 kernel :)
Thanks to Eric for the hint that I run the false kernel to use Sage.
Asked: 2023-12-24 12:55:44 +0100
Seen: 225 times
Last updated: Dec 25 '23
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