run()
check_1phase_first_derivatives()
check_sat_first_derivatives()
check_sat_second_derivatives()
first_derivative()
second_derivative()
teest_1phase_first_derivatives()
teest_sat_first_derivatives()
teest_sat_second_derivatives()
PropsFailures
PropsFailures.testMatrix()
PropsFailures.testUnmatchedLengths()
check_type()
test_input_types()
test_back_compatibility()
test_new_code()