Improper Integrals with the HP-15C LE & CE

[Nigel (UK)]

The WP34S (actual calculator) returns 1.99999998508 in about 2 seconds. The double exponential integration algorithm, which it uses, is really good at coping with integrable singularities at the limits of integration. It does not cope so well with singularities within the range of integration. I don’t believe that there is a single algorithm that works well in all cases; since each calculator uses just one algorithm, which one is best depends upon what sort of integrals you normally evaluate.

Nigel (UK)