Nontrivial

//ˌnɒnˈtɹɪ.vi.əl// adj

Definitions

Adjective
  1. 1
    Not trivial.; Not obvious or easy to prove; not self-evident.
  2. 2
    Not trivial.; Not being of the simplest kind; not being empty or a singleton.

    "nontrivial subgroup"

  3. 3
    Not trivial.; Needing significant computing power to solve; intractable.

Etymology

From non- + trivial.

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