… to (== 0.0) comparison. Fixes #1150.
… the function coefficients and initial guess were integers. Backport of r6579.
Also add the latter changes to their respective docstrings, and fix some asserts in their tests.
… sizes For large "difficult" sizes, the current single precision implementation apparently falls back to a non-optimal algorithm, and can produce large rounding errors. (bug #1212) This commit provides a work-around, by enabling the single-precision algorithms only for sizes that are composite numbers of 2, 3, and 5, for which FFTPACK has explicit support. This is probably a rather conservative approach.
…y (addresses #683) (cherry picked from commit r6548)
… are implemented (cherry picked from commit r6547)
… Fixes #1204. Backport of r6542.
Backport of r6540.
…al differences on non-x86 platforms (cherry picked from r6520)
…iteration did not converge (cherry picked from r6519)
Backport of r6517.
Backport of r6515.
Backport of r6513.