meaning of parallelism

1. The quality or state of being parallel.
2. Resemblance; correspondence; similarity.
3. Similarity of construction or meaning of clauses placed side by side, especially clauses expressing the same sentiment with slight modifications, as is common in Hebrew poetry; e. g. : --//At her feet he bowed, he fell:/Where he bowed, there he fell down dead. Judg. v. 27.
4. parallelism 1. parallel processing. 2. The maximum number of independent subtasks in a given task at a given point in its execution. E. g. in computing the expression a + b * c + d the expressions a, b, c and d can all be calculated in parallel giving a degree of parallelism of at least four. Once they have been evaluated then the expressions a + b and c + d can be calculated as two independent parallel processes. The Bernstein condition states that processes P and Q can be executed in parallel or in either sequential order only if: i there is no overlap between the inputs of P and the outputs of Q and vice versa and ii there is no overlap between the outputs of P, the outputs of Q and the inputs of any other task. If process P outputs value v which process Q reads then P must be executed before Q. If both processes write to some variable then its final value will depend on their execution order so they cannot be executed in parallel if any other process depends on that variables value.
5. similarity by virtue of correspondence

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