0000399: FIXED: autogkintegrate crashes on certain function spaces for no apparent reason

Viewing Issue Simple Details [ Jump to Notes ]

[ View Advanced ] [ Issue History ] [ Print ]

Category

Severity

Reproducibility

Date Submitted

Last Update

0000399

[ALGLIB] Integration

crash

always

2011-05-11 12:23

2011-05-14 17:54

Reporter

Gideon

View Status

public

Assigned To

SergeyB

Priority

normal

Resolution

fixed

Status

resolved

Product Version

3.3.0

Summary

0000399: FIXED: autogkintegrate crashes on certain function spaces for no apparent reason

Description

I am using alglib.autogksmooth and autogkintegrate to integrate a function f(x). f(x) is smooth and continuous. Autogkintegrate runs out of memory on certain values of x but exceeds on most other values.

Additional Information

For example x=3.34 works within 255 function evaluations, x=3.35 crashes (i.e. endless function evaluations), x=3.5 works.

I will send a sample app to illustrate the error.

Programming language

Attached Files

Relationships

Notes
(0000054) SergeyB (administrator) 2011-05-14 17:54	Function being integrated contains small numerical noise which confuses criteria used to stop algorithm once it achieves desired accuracy. In order to fix this bug two changes were introduced: a) inner stopping condition was made less strict b) upper limit on number of iterations was imposed

Issue History
Date Modified	Username	Field	Change
2011-05-11 12:23	Gideon	New Issue
2011-05-11 12:23	Gideon	Programming language	=> C#
2011-05-11 15:04	SergeyB	Status	new => assigned
2011-05-11 15:04	SergeyB	Assigned To	=> SergeyB
2011-05-14 17:54	SergeyB	Note Added: 0000054
2011-05-14 17:54	SergeyB	Status	assigned => resolved
2011-05-14 17:54	SergeyB	Fixed in Version	=> Next release
2011-05-14 17:54	SergeyB	Resolution	open => fixed
2011-05-14 17:54	SergeyB	Summary	autogkintegrate crashes on certain function spaces for no apparent reason => FIXED: autogkintegrate crashes on certain function spaces for no apparent reason

Mantis 1.1.6[^]