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StackOverflowError occurs when computing Simplify(Sin(Pi*Cosh(45522*Csc(17/36*Pi)))) #930

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tranleduy2000 opened this issue Mar 10, 2024 · 2 comments
Open

StackOverflowError occurs when computing Simplify(Sin(Pi*Cosh(45522*Csc(17/36*Pi)))) #930

tranleduy2000 opened this issue Mar 10, 2024 · 2 comments
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@tranleduy2000
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There is the input

Simplify(Sin(Pi*Cosh(45522*Csc(17/36*Pi))))
image 
java.lang.StackOverflowError
	at org.matheclipse.core.expression.F.ast(F.java:8625)
	at org.matheclipse.core.expression.F.PlusAlloc(F.java:14349)
	at org.matheclipse.core.reflection.system.TrigExpand$TrigExpandFunction.expandCoshPlus(TrigExpand.java:284)
	at org.matheclipse.core.reflection.system.TrigExpand$TrigExpandFunction.expandCoshPlus(TrigExpand.java:292)
	at org.matheclipse.core.reflection.system.TrigExpand$TrigExpandFunction.expandCoshPlus(TrigExpand.java:292)
	at org.matheclipse.core.reflection.system.TrigExpand$TrigExpandFunction.expandCoshPlus(TrigExpand.java:292)
	at org.matheclipse.core.reflection.system.TrigExpand$TrigExpandFunction.expandCoshPlus(TrigExpand.java:292)
	at org.matheclipse.core.reflection.system.TrigExpand$TrigExpandFunction.expandCoshPlus(TrigExpand.java:292)
	at org.matheclipse.core.reflection.system.TrigExpand$TrigExpandFunction.expandCoshPlus(TrigExpand.java:292)
	at org.matheclipse.core.reflection.system.TrigExpand$TrigExpandFunction.expandCoshPlus(TrigExpand.java:292)
	at org.matheclipse.core.reflection.system.TrigExpand$TrigExpandFunction.expandCoshPlus(TrigExpand.java:292)
@axkr
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axkr commented Mar 10, 2024 •
edited

Best solution would be to transform these recursions in TrigExpand into an iterative loop.

"Work around" can be to set: Config.MAX_AST_SIZE = 20000 to avoid to big expressions.

@axkr axkr self-assigned this Mar 10, 2024
@axkr axkr added the bug label Mar 10, 2024
axkr added a commit that referenced this issue Mar 10, 2024
@axkr
WIP #930 iterative function for TrigExpand of Cosh / Sinh(a+b+c)
7de2624
@axkr
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axkr commented Mar 10, 2024 •
edited

TODO replace other recursive versions in TrigExpand#expandPlus() with iterative versions

axkr added a commit that referenced this issue Mar 10, 2024
@axkr
WIP #930 iterative function for TrigExpand of Cosh / Sinh(a+b+c)
e9188ef
axkr added a commit that referenced this issue Mar 10, 2024
@axkr
WIP #930 iterative functions for TrigExpand
286f66d
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