1 | initial version |

Helloooo everybody !!

Indeed, they are numbered this way just because of the order in which they are created. And there is no specific reason why they are called `x`

. For the code you give as an example, I would not know from the inside of objects p or w that the value is stored in a variable which is named 'w'. Hence I do not know how to make this appear in p.show(). Actually, there is in Sage a way to "name" variables :

```
sage: p=MixedIntegerLinearProgram()
sage: w=p.new_variable(name="w")
sage: p.add_constraint(-w[0]+2*w[2]+3*w[3]==4)
sage: p.add_constraint(w[0]+w[1]+w[3]==3)
sage: p.set_objective(w[0]- w[1])
sage: p.show()
Maximization:
w[0] -w[1]
Constraints:
R0: 4.0 <= -w[0] +2.0 w[2] +3.0 w[3] <= 4.0
R1: 3.0 <= w[0] +w[3] +w[1] <= 3.0
Variables:
w[0] is a continuous variable (min=0.0, max=+oo)
w[2] is a continuous variable (min=0.0, max=+oo)
w[3] is a continuous variable (min=0.0, max=+oo)
w[1] is a continuous variable (min=0.0, max=+oo)
```

But there you had to explicitely say that the variables had to be named by "w". Well. Now, this changes nothing to their numbering, and I have no idea how to fix that. In the part of the code that displays the formulas, the keys you used to access the variables have been forgotten a loooong time ago. I agree that the result of p.show() would be muc easier to read though...

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