Scleronomic constraint with explicit time dependence?

[kokolovehuh]

Hi all,
I was having a bit difficulty understanding the term scleronomic constraint.
From what I have read, it is a type of holonomic system(which means there is time dependence). However, the difference between the two types(scleronomic and rheonomic), is that although scleronomic constraint is independent of time there is still time dependence in q(generic dynamic variable). This leads me to think that there is an explicit time dependence in that type of constraint. Yet, from what I read from a book, it says scleronomic constraint cannot have explicit time dependence. How is this the case?

Regards

Owen

 

[kokolovehuh]

correction: the time dependence refers to the Lagrangian, which are under the scleronomic constrain in this case.