feynlag.vacuum.tadpoles.extract_tadpoles¶ feynlag.vacuum.tadpoles.extract_tadpoles(potential, vacuum)[source]¶ Tadpole conditions {vev: ∂V/∂vev |_vacuum} (all must vanish). Parameters: potential – the scalar potential V (NOT −V; feynlag stores the Lagrangian with L ⊃ −V). vacuum – Vacuum.