Different solution with MathCAD - why? - definite integral Options  Email this topic  Watch this topic  Print this topic » Normal Threaded

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Walter316		#1 Posted : 07 March 2019 11:20:13(UTC)
Rank: Newbie Groups: Registered Joined: 07/03/2019(UTC) Posts: 2 Location: Graz		Hi I have tried to calculate this elliptic Integral with MathCAD v15 and SMath. But I get a Different solution with MathCAD - why? Thanks for help. WaLTER Eliptic.sm (18kb) downloaded 30 time(s).
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Davide Carpi		#2 Posted : 07 March 2019 11:54:20(UTC)
Rank: Advanced Member Groups: Registered, Advanced Member Joined: 13/01/2012(UTC) Posts: 2,654 Location: Italy Was thanked: 1340 time(s) in 879 post(s)		Hello Walter, results are different because you are making another calculation: numerator of the mathcad function is l (lowercase L) while in SMath is 1 (one); upper bound of the integral is e (Euler's number) in mathcad, while is 0.5 in SMath; Edited by user 07 March 2019 13:46:36(UTC)  | Reason: marked as solved
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Walter316		#3 Posted : 07 March 2019 12:02:35(UTC)
Rank: Newbie Groups: Registered Joined: 07/03/2019(UTC) Posts: 2 Location: Graz		Thanks - I really did not see this.
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ndtma		#4 Posted : 07 March 2019 12:29:45(UTC)
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Jean Giraud		#5 Posted : 07 March 2019 17:12:47(UTC)
Rank: Guest Groups: Registered Joined: 04/07/2015(UTC) Posts: 6,866 Was thanked: 981 time(s) in 809 post(s)		Originally Posted by: Walter316 Thanks for help. Always plot the integrand to avoid disaster. Simpson integrator ranges from exact to absolute scrap. In doubt, sanity vs Mathcad 11 adaptive. In your example: watch the low limit. Alternately, sanity Wolfram Integrator Jean Eliptic (1).sm (28kb) downloaded 18 time(s).
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