What does 1PI stand for?

1PI stands for "One Particle Irreducible"

How to abbreviate "One Particle Irreducible"?

"One Particle Irreducible" can be abbreviated as 1PI

What is the meaning of 1PI abbreviation?

The meaning of 1PI abbreviation is "One Particle Irreducible"

What does 1PI mean?

1PI as abbreviation means "One Particle Irreducible"