## A0ToB0

`A0ToB0` is an option for `A0`. If set to `True`, `A0[m^2]` is expressed by `(1 + B0[0, m^2, m^2]) m^2`.

### See also

[Overview](Extra/FeynCalc.md), [A0](A0.md), [B0](B0.md), [C0](C0.md), [D0](D0.md), [PaVe](PaVe.md).

### Examples

```mathematica
A0[m^2]
```

$$\text{A}_0\left(m^2\right)$$

```mathematica
A0[m^2, A0ToB0 -> True]
```

$$-\frac{2 m^2 \;\text{B}_0\left(0,m^2,m^2\right)}{2-D}$$