## New features as of 6/10/2004

- Use
`a=b`

to create two undirected edges between
`a`

and `b`

.
- Use the keyword
`integrate`

to compute the integral
from zero to one.

Example

```
root 1
```

integrate

1=2

yields the output `0.6666666666666667`

## New features as of 6/16/2004

- Use
`sink t`

to compute the probability that
`t`

is connected to the root.

Example

```
root 1
```

sink 3

1-2, 2-3, 3-4, 4-5, 5-6, 6-1

yields the output `p^2 + p^4 - p^6`