ndarray
cupy.ufunc
cupy.fft
cupy.linalg
cupy.random
cupy.testing
cupyx.scipy.fft
cupyx.scipy.fftpack
cupyx.scipy.linalg
cupyx.scipy.ndimage
cupyx.scipy.signal
cupyx.scipy.sparse
cupyx.scipy.sparse.linalg
cupyx.scipy.sparse.csgraph
cupyx.scipy.spatial
cupyx.scipy.spatial.distance
cupyx.scipy.special
cupyx.scipy.stats
Tests elementwise if the sign bit is set (i.e. less than zero).
See also
numpy.signbit