I have a friend trying to get Sage to explicitly use the chain rule:
sage: var('s')
s
sage: t=function('t',s)
sage: t
t(s)
sage: y=function('y', t)
sage: y
y(t(s))
sage: y.diff(s)
diff(y(t(s)), s, 1)
We would like to somehow get:
diff(y(t(s)), t(s), 1)*diff(t(s), s, 1)
or something else that signifies the chain rule has been applied. Is
this possible?
Jason
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