Simplex - Simplex
| x : | RealPos[] (pass by const reference) |
| A vector of values. | |
| Default : NULL | |
| x1 : | RealPos (pass by const reference) |
| first value | |
| Default : NULL | |
| x2 : | RealPos (pass by const reference) |
| second value | |
| Default : NULL | |
| ... : | RealPos (pass by const reference) |
| additional values |
```rb
x <- simplex([2, 2, 6])
x # = [ 0.2, 0.2, 0.6]
sum(x) # 1, by definition
```