Magnitude of a complex number

[Oscar Benjamin]

Am I misunderstanding something here (using master):

$ isympy
Couldn't locate IPython. Having IPython installed is greatly recommended.
...
>>> z = (4+3*I)/(3-4*I)
>>> z
4 + 3⋅ⅈ
───────
3 - 4⋅ⅈ
>>> abs(z)
│ 1 │
5⋅│───────│
│3 - 4⋅ⅈ│
>>> simplify(abs(z))
│ 1 │
5⋅│───────│
│3 - 4⋅ⅈ│
>>> abs(z).evalf()
1.00000000000000
>>> abs(z) ** 2
2
│ 1 │
25⋅│───────│
│3 - 4⋅ⅈ│
>>> z * z.conjugate()
(4 - 3⋅ⅈ)⋅(4 + 3⋅ⅈ)
───────────────────
(3 - 4⋅ⅈ)⋅(3 + 4⋅ⅈ)
>>> simplify(z * z.conjugate())
1

Why doesn't abs(z) simplify (or should I open an issue)?


--
Oscar

[Aaron Meurer]

I guess simplify() just doesn't know about abs. You can open an issue.

Aaron Meurer

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