复变

(math.) complex variable

to go and return / to return / to resume / to return to a normal or original state / to repeat / again / to recover / to restore / to turn over / to reply / to answer / to reply to a letter / to retaliate / to carry out

to repeat / to double / to overlap / complex (not simple) / compound / composite / double / diplo- / duplicate / overlapping / to duplicate

variant of 復|复[fu4] / to reply to a letter

to change / to become different / to transform / to vary / rebellion

function of a complex variable (math.)

(math.) theory of functions of a complex variable