コード例 #1
0
ファイル: test_guess.py プロジェクト: A-turing-machine/sympy
def test_find_simple_recurrence():
    a = Function('a')
    n = Symbol('n')
    assert find_simple_recurrence([fibonacci(k) for k in range(12)]) == (
        -a(n) - a(n + 1) + a(n + 2))

    f = Function('a')
    i = Symbol('n')
    a = [1, 1, 1]
    for k in range(15): a.append(5*a[-1]-3*a[-2]+8*a[-3])
    assert find_simple_recurrence(a, A=f, N=i) == (
        -8*f(i) + 3*f(i + 1) - 5*f(i + 2) + f(i + 3))
    assert find_simple_recurrence([0, 2, 15, 74, 12, 3, 0,
                                    1, 2, 85, 4, 5, 63]) == 0
コード例 #2
0
ファイル: test_guess.py プロジェクト: PWJ1900/Rlearncirq
def test_find_simple_recurrence():
    a = Function('a')
    n = Symbol('n')
    assert find_simple_recurrence([fibonacci(k) for k in range(12)
                                   ]) == (-a(n) - a(n + 1) + a(n + 2))

    f = Function('a')
    i = Symbol('n')
    a = [1, 1, 1]
    for k in range(15):
        a.append(5 * a[-1] - 3 * a[-2] + 8 * a[-3])
    assert find_simple_recurrence(a, A=f, N=i) == (-8 * f(i) + 3 * f(i + 1) -
                                                   5 * f(i + 2) + f(i + 3))
    assert find_simple_recurrence([0, 2, 15, 74, 12, 3, 0, 1, 2, 85, 4, 5,
                                   63]) == 0