Sequent calculus

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Notion

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Science and technology

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What Wikipedia says

In mathematical logic, sequent calculus is a style of formal logical argumentation in which every line of a proof is a conditional tautology (called a sequent by Gerhard Gentzen) instead of an unconditional tautology.

Excerpt from the Wikipedia article “Sequent calculus”, under the CC BY-SA 4.0 license. Read the article on Wikipedia