def tdesign_params(t, v, k, L):
"""
Return the design's parameters: `(t, v, b, r , k, L)`. Note that `t` must be
given.
EXAMPLES::
sage: BD = BlockDesign(7,[[0,1,2],[0,3,4],[0,5,6],[1,3,5],[1,4,6],[2,3,6],[2,4,5]])
sage: from sage.combinat.designs.block_design import tdesign_params
sage: tdesign_params(2,7,3,1)
(2, 7, 7, 3, 3, 1)
"""
x = binomial(v, t)
y = binomial(k, t)
b = divmod(L * x, y)[0]
x = binomial(v - 1, t - 1)
y = binomial(k - 1, t - 1)
r = integer_floor(L * x / y)
return (t, v, b, r, k, L)
def tdesign_params(t, v, k, L):
"""
Return the design's parameters: `(t, v, b, r , k, L)`. Note that `t` must be
given.
EXAMPLES::
sage: BD = BlockDesign(7,[[0,1,2],[0,3,4],[0,5,6],[1,3,5],[1,4,6],[2,3,6],[2,4,5]])
sage: from sage.combinat.designs.block_design import tdesign_params
sage: tdesign_params(2,7,3,1)
(2, 7, 7, 3, 3, 1)
"""
x = binomial(v, t)
y = binomial(k, t)
b = divmod(L * x, y)[0]
x = binomial(v-1, t-1)
y = binomial(k-1, t-1)
r = integer_floor(L * x/y)
return (t, v, b, r, k, L)