Formal Language Theory
Regular expressions describe regular languages in formal language theory. They have the same expressive power as regular grammars.
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Famous quotes containing the words formal, language and/or theory:
“The manifestation of poetry in external life is formal perfection. True sentiment grows within, and art must represent internal phenomena externally.”
—Franz Grillparzer (1791–1872)
“Our language has wisely sensed these two sides of man’s being alone. It has created the word “loneliness” to express the pain of being alone. And it has created the word “solitude” to express the glory of being alone. Although, in daily life, we do not always distinguish these words, we should do so consistently and thus deepen our understanding of our human predicament.”
—Paul Tillich (1886–1965)
“every subjective phenomenon is essentially connected with a single point of view, and it seems inevitable that an objective, physical theory will abandon that point of view.”
—Thomas Nagel (b. 1938)