Lectures on fundamental concepts of algebra and geometry (1911)
Young, John Wesley, 1879-1932, Denton, William Wells, Mitchell, Ulysses Grant · New York : Macmillan · leaf 43
thecenter of the sphere andpiercing the boundary at Pand Q (Fig. 6). Let E bethe given point, and let ussee if a shortest line canalways be drawn throughit, which will intersectbo^h half lines. If wedraw the circle through P and Q which cuts the boundaryorthogonally, we can easily see that if E… … FiQ. 6 LECTURE III 31 non-euclidean geometry was Gauss (1777-1855). In someletters to friends, written near the beginning of the nine-teenth century, he said many things that intimate that hewas himself for some years in possession of the principlesof non-euclidean geometry, but it is doubtful just…
Algebra · Geometry
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