As an adverb mutually
is in the same way, each to the other; reciprocally.
As an adjective interreducible is
describing matrices that are mutually reducible.
mutually
English
Adverb
(
en adverb)
in the same way, each to the other; reciprocally
- The contract was mutually binding.
in a shared manner; equally; affecting all parties the same way
- The adventure was mutually beneficial.
interreducible
English
Adjective
(-)
(mathematics) Describing matrices that are mutually reducible