how can i type this?

X[ij

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change the vector element in the variable X to a matrix element => el(X,ij) to el(X,i,j)

Wrote

how can i type this?

Step by step:
1 - X
2 - [
3 - i
4 - , (, or ; which one is your argument separator)
5 - j

> X[i,j

Regards

How can i type this example in smath?

Hi. Some options.

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Best regards.
Alvaro.

Wrote

How can I type this example in Smath

In otherwise subscript style ... parametric/productive.

Wrote

Hi. Some options.

Notation.sm (4 КиБ) скачан 167 раз(а).



Best regards.
Alvaro.

Thanks for answering. But how write superscripts?

Wrote

... Thanks for answering. But how write superscripts?

Hi. No practical way in SMath, but with Unicode characters. Search for 'cero' in your language in windows charmap, copy and paste.



To do it without artifice you would have to have a function, like in Mathematica: https://reference.wolfram.com/language/ref/Superscript.html

Best regards.
Alvaro.