How to find out runtime version of Maxima? (confused by new format of eigenvectors() in 5.19.2)



Hi,

Is it possible to find out which version of Maxima is used at runtime?

I'm asking because the latest version 5.19.2 breaks my program:
eigenvectors now returning a list in different format.  How can I
write code to run on both 5.19.2 and earlier versions?

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Regards,
Alex