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Use "surjective" in a sentence
"In analogy with the genetic code, non-power integer-number representations are also surjective mappings between sets of different cardinality and, as such, also redundant."
"From a mathematical point of view, the genetic code is a surjective mapping between the set of the 64 possible three-base codons and the set of 21 elements composed of the 20 amino acids plus the Stop signal."
"In Math Man's terms: you can write an injective relationship, but not a surjective one."