a system of geometry worthy of the name, which has any material departures (we do not speak of corrections or extensions or developments) from the plan laid down by Euclid.” In 1908, when that ...

THE appearance of a school edition of “Euclid's Elements,” published under the auspices of the Cambridge University Press, provokes reflections upon the strange position so long maintained in ...

Discover the extraordinary Einstein ring discovered by the Euclid space telescope. A perfect ring of light encircling galaxy ...

Things which are equal to the same thing are also equal to one another. If equals be added to equals, the wholes are equal. If equals be subtracted from equals, the remainders are equal.