Since the symbolic integrals of many bessel functions
involve struve_h functions, it would be nice for limit
to know about them.
Here is an example of an integral which stalls for lack
of such knowledge:
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(%i2) integrate(bessel_y(2,x),x,1,inf);
(%o2) 'limit( (%pi*struve_h(0,x)*bessel_y(1,x)
+%pi*struve_h(-1,x)*bessel_y(0,x))*x/2
-2*bessel_y(1,x), x, inf, minus)
-((%pi*struve_h(0,1)-4)*bessel_y(1,1)
+%pi*struve_h(-1,1)*bessel_y(0,1))/2
(%i3) limit (bessel_y(1,x),x,inf,minus);
(%o3) 0
(%i4) limit (struve_h(0,x),x,inf,minus);
(%o4) 'limit(struve_h(0,x),x,inf,minus)
(%i5) limit (struve_h(-1,x),x,inf,minus);
(%o5) 'limit(struve_h(-1,x),x,inf,minus)
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Ted Woollett