### Some articles on *deduction systems, systems, deduction*:

Mathematical Logic - Proof Theory and Constructive Mathematics

... Proof theory is the study of formal proofs in various logical

... Proof theory is the study of formal proofs in various logical

**deduction systems**... Several**deduction systems**are commonly considered, including Hilbert-style**deduction systems**,**systems**of natural**deduction**, and the sequent calculus developed by ... of constructive mathematics, in the context of mathematical logic, includes the study of**systems**in non-classical logic such as intuitionistic logic ...### Famous quotes containing the word systems:

“The only people who treasure *systems* are those whom the whole truth evades, who want to catch it by the tail. A system is just like truth’s tail, but the truth is like a lizard. It will leave the tail in your hand and escape; it knows that it will soon grow another tail.”

—Ivan Sergeevich Turgenev (1818–1883)

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