Assumptions:
TeX:
{z + 1 \choose k + 1} = \frac{z + 1}{k + 1} {z \choose k}
z \in \mathbb{C} \;\mathbin{\operatorname{and}}\; k \in \mathbb{Z}_{\ge 0}Definitions:
| Fungrim symbol | Notation | Short description | 
|---|---|---|
| Binomial | Binomial coefficient | |
| CC | Complex numbers | |
| ZZGreaterEqual | Integers greater than or equal to n | 
Source code for this entry:
Entry(ID("6e1f13"),
    Formula(Equal(Binomial(Add(z, 1), Add(k, 1)), Mul(Div(Add(z, 1), Add(k, 1)), Binomial(z, k)))),
    Variables(z, k),
    Assumptions(And(Element(z, CC), Element(k, ZZGreaterEqual(0)))))