Such that, for every x in the domain, for each small open interval D about f(x), there's an interval containing x whose image is in D.
Expressing an ongoing action or state.
Not deviating or varying from uniformity; not interrupted; not joined or articulated.
Without stopping; without a break, cessation, or interruption.
Without intervening space; continued.
Such that each open set in the target space has an open preimage (in the domain space, with respect to the given function).
For which any return to it must occur in multiples of k time steps, for some k>1.
Relating to the highest oxidation state of iodine; of or derived from a periodic acid.
Periodical.
Pertaining to the revolution of a celestial object in its orbit.
Relative to a period or periods.
Having repeated cycles.
Occurring at regular intervals.
Having a structure characterized by periodic sentences.