Hemicrania continua for the headache. When the symptoms of hemicrania continua are present, it's considered "diagnostic" if they respond completely to indomethacin. The efficacy of indomethacin may not be long term for all patients, as can eventually become ineffective. The factor that allows hemicrania continua and its exacerbations to be differentiated from migraine and cluster headache is that hemicrania continua is completely responsive to indomethacin. Triptans and other abortive medications do not affect hemicrania continua. In addition to persistent daily headache of HC, which is usually mild to moderate (and frequently severe), HC can present other symptoms. These additional symptoms of HC
Formally smooth map equivalent to usual notion of smoothness. Formally smooth map In algebraic geometry and commutative algebra, a ring homomorphism formula_1 is called formally smooth (from French: "Formellement lisse") if it satisfies the following infinitesimal lifting property: Suppose "B" is given the structure of an "A"-algebra via the map "f". Given a commutative "A"-algebra, "C", and a nilpotent ideal formula_2, any "A"-algebra homomorphism formula_3 may be lifted to an "A"-algebra map formula_4. If moreover any such lifting is unique, then "f" is said to be formally étale. Formally smooth maps were defined by Alexander Grothendieck in "Éléments de géométrie algébrique" IV. For