oscillating

adjective2

1. •
   Moving in a repeated back-and-forth motion; coming and going.

   • In general the experiments proved that in nephritis the secretion of the gastric mucosa is vitiated. This vitiation is exceedingly oscillating. — 1891
2. •
   Describing a function or divergent series that moves between multiple values.

   • Highly oscillating sequences converge in the weak topology, i.e., the topology of convergence of integral means. — 2002