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# delip

complete and incomplete elliptic integral of first kind

### Calling Sequence

[r]=delip(x,ck)

### Arguments

- x
real vector/matrix with nonnegative elements

- ck
real number between -1 and 1

- r
real or complex number (or vector/matrix) with the same size as

`x`

### Description

The elliptic integral of the first kind with parameter
`ck`

is defined as follow:

Where `x`

is real and positive,
`ck`

is in `[-1 1]`

.

If `x`

is less than 1 the result is real.

When called with `x`

a vector/matrix `r`

is evaluated for each entry of `x`

.

## Comments

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