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Why does implicit multiplication not work in the Sage Cell Server?

asked 2020-06-17 15:37:41 -0500

dsejas gravatar image

Hello, Sage Community!

Is there any reason for implicit_multiplication(True) not having any effect in SageCell? Is there any way of solving this?

Thanks in advance for your answers!

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answered 2020-06-17 19:08:40 -0500

tmonteil gravatar image

updated 2020-06-17 19:38:43 -0500

I think this is not specific to SageCell. It is the same in jupyter. implicit_multiplication changes the behaviour of the preparser, but the whole cell is preparsed according to the previous state of the preparser.

If, in a single cell, you write:

implicit_multiplication(True)
2x

You will get an error. But if you put the two lines in different cells, then it will work.

To take another example, you can do:

preparser(False)
type(1)

You will get <class 'sage.rings.integer.Integer'> because the whole cell was preparsed before the preparser is turned off. If you put the two lines in two different cells, you will get <class 'int'>, because the second line will not be preparsed anymore.

About the Sage preparser, see https://doc.sagemath.org/html/en/refe...

The sagecell works like a single jupyter cell.

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Hello, @tmonteil! I see. Is there any possible tweak for using implicit multiplication in Sage Cell? Or is this a definitive unavoidable behavior?

dsejas gravatar imagedsejas ( 2020-06-22 11:46:12 -0500 )edit

I doubt there is an easy way without modifying sagecell (or running your own).

tmonteil gravatar imagetmonteil ( 2020-06-23 05:45:24 -0500 )edit

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Asked: 2020-06-17 15:37:41 -0500

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Last updated: Jun 17