fact: Definition ps_add {α} {r : ring α} (ps₁ ps₂ : puiseux_series α) := {| ps_terms := ps_terms_add ps₁ ps₂; ps_ordnum := ps_ordnum_add ps₁ ps₂; ps_polydo := cm ps₁ ps₂ |}.
imports: Utf8 QArith NPeano NbarM Misc Field2 Power_series Puiseux_series