indecomposable
Speech parts
1. indecomposable - Noun
2. indecomposable - Adjective
Meaning
Not decomposable; incapable or difficult of decomposition; not resolvable into its constituents or elements.
Source: Webster's dictionarySynonyms
Antonyms
Examples
Every injective module can be decomposed as direct sum of indecomposable injective modules.
In classical arithmetic any indecomposable number is a prime (and vice versa), but in more general domains a number may be indecomposable, such as 3 here, yet not prime in the earlier sense.
The representation ring's additive group is the free abelian group whose basis are the indecomposable modules and whose addition corresponds to the direct sum.
Expressing a module in terms of the basis is finding an indecomposable decomposition of the module.
Then each is an abelian category and we have an inclusion functor identifying the simple projective, simple injective and indecomposable projective-injective modules.
Then the trace of the indecomposable element v ⊗ f is defined to be f(v); the trace of a general element is defined by linearity.