单词	irrational number
释义	irrational number A real number that is not rational. A famous proof, sometimes attributed to Pythagoras, shows that is irrational; the method can also be used to show that numbers such as and are also irrational. It follows that numbers like and are irrational. The proof that e is irrational is reasonably easy, and in 1761 Lambert showed that π is irrational. There are uncountably many irrationals, compared with denumerably many rationals, so in a sense ‘most' real numbers are irrational. Any real number with a non-recurring decimal representation is irrational. See also transcendental.
随便看	kurtosis Königsberg bridge problem k‐simplex L labelling algorithm lag Lagrange interpolation Lagrange, Joseph‐Louis Lagrange multiplier Lagrange point Lagrange's equations Lagrange's Theorem Lagrange's Theorem Lagrangian Lagrangian derivative Lakatos, Imre Lambert, Johann Heinrich lamina Lami's Theorem Landau's problems Langlands programme Langlands, Robert Laplace expansion Laplace, Pierre‐Simon, Marquis de Laplace's equation

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