[sympy] Re: sympy.vector

Hi Sebastian, You are right. There is open #issue for this but unfortunately, there has been no progress. This pull request by Szymon is still incomplete. On Tuesday, July 16, 2019 at 9:29:18 PM

Re: [sympy] which AccumBounds result is correct

Thanks. subs should probably expand fully any expression for which a symbol is being replaced with an AccumBounds as in `expr.subs(x, AccumBound(a,b))` so something like `x*(1 + x)` would be handled as `x + x**2`. On Saturday, July 20, 2019 at 5:46:13 AM UTC-5, Oscar wrote: > > I guess this is

Re: [sympy] which AccumBounds result is correct

I guess this is the dependency problem in interval arithmetic: https://en.wikipedia.org/wiki/Interval_arithmetic#Dependency_problem (Note that x**2+x is the example used there) The issue is that we have to know the identity of the intervals. For example if x and y are distinct intervals both

[sympy] which AccumBounds result is correct

Which result is correct? The second is a refactoring of the first: >>> AccumBounds(-1, 1) + AccumBounds(-1, 1)**2 AccumBounds(-1, 2) >>> AccumBounds(-1, 1)*(1 + AccumBounds(-1, 1)) AccumBounds(-2, 2) -- You received this message because you are subscribed to the Google Groups