## $FCDefaultLightconeVectorN

`$FCDefaultLightconeVectorN` is  a global variable which is set to FCGV["n"]. It denotes the default name for the vector $n$ in the lightcone decomposition for Lorentz tensors.

### See also

[Overview](Extra/FeynCalc.md), [MemSet](MemSet.md), [FCMemoryAvailable](FCMemoryAvailable.md).

### Examples

```mathematica
$FCDefaultLightconeVectorN
```

$$\text{FCGV}(\text{n})$$