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Convergence articles

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A number of 3 digits in base 7 has the same three digits...
There is a right triangle where: the sum of the upright multiplied by itself twice and the hypotenuse multiplied by itself is 700 units; and, the sum of the base multiplied by itself twice and the hypotenuse multiplied by itself is 900 units.
In Archimedes' Book of Lemmas (ca 250), he introduces a figure that, due to its shape, has historically been known as "the shoemaker's knife" or arbelos.
Given: a circle with an inscribed equilateral triangle. The triangle has an area of 12 square units. What is the area of the circle?
A gallery of episodes from the history of calculus.

Images of the first printed edition of Euclid's Elements

A castle has n rooms each of which has 7 samurai in it.

A discussion of why we use "e" to represent the base of the natural logarithm system.

A cultural history of the infinite, from ancient to modern times, in which the author clarifies the conceptual underpinnings of this vast topic.
A historically minded textbook designed to teach real analysis by considering some of the problems faced by 19th century mathematicians.

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