Why combination and permutation is useless in physics

[tze liu]

discuss whether combination and permutation in math are useless in physics
the undergraduate math courses related to physics always contain algebra,complex number and calculus.

however we don't need to study discrete math /combination and permutation in those courses

that means those stuffs are useless in physics ?if so, why they are useless in physics?

 

[Vanadium 50]

Stat mech and the Gibbs paradox.

 

[JonnyG]

You need permutations for differential forms, which are used in physics.

 

[berkeman]

discuss whether combination and permutation in math are useless in physics
the undergraduate math courses related to physics always contain algebra,complex number and calculus.

however we don't need to study discrete math /combination and permutation in those courses

that means those stuffs are useless in physics ?if so, why they are useless in physics?

Is this for a schoolwork/homework question?