# p1.tau

From elliptic v1.4-0
by Robin K S Hankin

##### Does the right thing when calling g2.fun() and g3.fun()

Takes vectors and
interprets them appropriately for input to `g2.fun()`

and
`g3.fun()`

. Not really intended for the end user.

- Keywords
- math

##### Usage

`p1.tau(b)`

##### Arguments

- b
Vector of periods

##### Details

If `b`

is of length two, interpret the elements as
\(\omega_1\) and \(\omega_2\) respectively.

If a two-column matrix, interpret the columns as \(\omega_1\) and \(\omega_2\) respectively.

Otherwise, interpret as a vector of \(\tau=\omega_1/\omega_2\).

##### Value

Returns a two-component list:

First period

Period ratio

##### Examples

```
# NOT RUN {
p1.tau(c(1+1i,1.1+23.123i))
# }
```

*Documentation reproduced from package elliptic, version 1.4-0, License: GPL-2*

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