If one proves the equality of two numbers <math>a</math> and <math>b</math> by showing first that <math>a \leqq b</math> and then that <math>a \geqq … - Emmy Noether

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If one proves the equality of two numbers <math>a</math> and <math>b</math> by showing first that <math>a \leqq b</math> and then that <math>a \geqq b</math>, it is unfair; one should instead show that they are really equal by disclosing the inner ground for their equality.