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Hello, my example cases for exponential regression are giving incorrect results. Would it be possible for someone to check the algorithm on this? (Wolfram alpha gives correct results on this data, so …
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```
What steps will reproduce the problem?
mean and mode
What is the expected output?
numerical outcome
What do you see instead?
no results
What version of Chrome are you using?
16.0.912.77
What opera…
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```
>>> pprint(Integral(1/(sin(x)**4 + cos(x)**4), x))
⌠
⎮ 1
⎮ ───────────────── dx
⎮ 4 4
⎮ sin (x) + cos (x)
⌡
…
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Hi,
I'm trying to use sympy to create a symbolic Taylor series of a fairly simple expression:
```
from sympy import *
a, b, x, alpha = symbols('a b x alpha')
f = (a*x**2 + b*x) ** (2 - alpha)
…
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**Describe the bug**
Title says everything. When I ask something with the word "name", it always triggers as it I would have asking the device's name. So it interferes for example with Wolfram Alpha …
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For any real `x`, both `sin(x) + 1` and `cos(x) + 1` should be known to be nonnegative; or, at least, it would be nice to `solve(cos(x) + 1 >= 0)`.
Would be even nicer if `floor(sin(x)/3 + 1/3)` woul…
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A couple of leftovers from #337.
gcd(a^a,a^(a-1)) => a should=> a^(a-1)
My implementation for gcd of EX is mainly targetted for gcd(2^a,6^a) => 2^a
And Wolfram Alpha gives gcd(2^a,6^(a-2)) => 2…
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```
A tester for each part, verifying everything still works.
Both static tester, with 5 different inputs and a random tester to verify there
are no crushes.
Future plan- a random tester that will b…
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```
a,x=Symbol('a x')
integrate(sqrt(x/(a-x)),x)
```
Result:
```
Integral(sqrt(x/(a-x))
```
Wolfram alpha is able to do this (GIF of result attached).
BTW, this integral appears when calcul…
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When #7 and #23 are complete, one can try to find the optimal values of the effect equation either analytically or numerically. My first analytical approaches yielded no result (and neither did wolfra…