# `∧` — Polar / And

Function. Keys: `Alt-0`. Ranks: `0` monadic, `0 0` dyadic

`∧Y` gives a magnitude and an angle for each number in `Y`, along a new
last axis. Angles are in radians.

``` bpl
∧0j2              ⍝ [2 1π2]
∧3j4              ⍝ 5 0.9272952180016122
```

`X∧Y` gives LCM; on Booleans, AND. Pervasive.

``` bpl
0 0 1 1∧0 1 0 1   ⍝ 0 0 0 1
4ₓ∧6ₓ              ⍝ 12ₓ
∧/1 1 0            ⍝ 0
```

Includes rational and complex LCM. Inputs are finite. Empty reduction
identity: one, or `$t` on Booleans.

## Inverse

`∧⁻¹Y` rebuilds complex numbers from the magnitude and angle pairs on
the last axis of `Y`.

``` bpl
∧⁻¹[2 π0.5]   ⍝ 0j2
```