billiebob
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 Apr28 comment Simplify does not simplify The terms cancel each other when you perform the Square root: Sqrt[(wb Z - w xiR^4 Zb)^2/xiR^4] = (wb Z - w xiR^4 Zb)/xiR^2. Apr28 awarded Custodian Apr28 awarded Editor Apr28 revised Simplify does not simplify added 3 characters in body Apr28 reviewed Approve Simplify does not simplify Apr28 asked Simplify does not simplify Apr28 comment Root: Simplifying symbolic expression Ok, I didn't realise this. It's just that I want to understand the output from for example Integrate[-((2 I \[Pi])/Sqrt[(r + A xiR - rb xiR^2)^2 - 4 (l xiR + w xiR^2 + Z) (wb - lb xiR + xiR^2 Zb)]),xiR] which gives an EllipticF[ArcSin[...]] from a gigantic expressions with a lot of Roots... I want to find the an expression for A wherefore this integral becomes zero but it's too complicated to understand so I wanted to simplify this integral... Apr24 comment Root: Simplifying symbolic expression @BobHanlon OK, I hoped there was a simpler way, but thanks! Apr24 comment Root: Simplifying symbolic expression @2012rcampion every variable is complex valued... Apr24 asked Root: Simplifying symbolic expression May8 awarded Notable Question Dec6 awarded Popular Question Apr28 comment Edit AxesLabel from an existing plot Ah, proofs I still have a lot to learn ;) Thanks man! Apr28 asked Edit AxesLabel from an existing plot Apr6 comment FindMaxValue vs FindMaximum Thanks, first i thought it was giving me the same problem as FindMaximum, but now i see you also can give 2 starting points to FindArgMax. So my problem with FindMaximum is the use of derivatives then? Apr6 asked FindMaxValue vs FindMaximum Apr4 awarded Supporter Apr3 awarded Scholar Apr3 comment Label points in plot with a text Thanks for this clear answer! Apr3 accepted Label points in plot with a text