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A tensor product of Hilbert spaces [1]_.

The tensor product between Hilbert spaces is represented by the
operator ``*`` Products of the same Hilbert space will be combined into
tensor powers.

A ``TensorProductHilbertSpace`` object takes in an arbitrary number of
``HilbertSpace`` objects as its arguments. In addition, multiplication of
``HilbertSpace`` objects will automatically return this tensor product

src/s/y/sympy-HEAD/sympy/core/tests/test_args.py   sympy(Download)
def test_sympy__physics__quantum__hilbert__TensorProductHilbertSpace():
    from sympy.physics.quantum.hilbert import TensorProductHilbertSpace, FockSpace, ComplexSpace
    c = ComplexSpace(2)
    f = FockSpace()
    assert _test_args(TensorProductHilbertSpace(f, c))

src/s/y/sympy-HEAD/sympy/physics/quantum/tests/test_printing.py   sympy(Download)
# Imports used in srepr strings
from sympy.physics.quantum.constants import HBar
from sympy.physics.quantum.hilbert import DirectSumHilbertSpace, TensorProductHilbertSpace, TensorPowerHilbertSpace
from sympy.physics.quantum.spin import JzOp, J2Op
from sympy import Add, Integer, Mul, Rational, Tuple

src/s/y/sympy-HEAD/sympy/physics/quantum/tests/test_hilbert.py   sympy(Download)
from sympy.physics.quantum.hilbert import (
    HilbertSpace, ComplexSpace, L2, FockSpace, TensorProductHilbertSpace,
    DirectSumHilbertSpace, TensorPowerHilbertSpace