Mathematical Essays and Recreations

addition aggregates of points algebra approximate Archimedes arithmetic augend auxiliary squares axiom of Euclid bers called cells century circle circle-squarers circumference commutative law complex numbers computation conceive construction cube curvature decimal places defined definition demonstration diagonal diameter edge and compasses Euclid exactly equal example exist fact Felix Klein four-dimensional space four-dimensioned space fraction geometry HERMANN SCHUBERT Hindu Hippocrates idea inscribed inverse involution knowledge laws of form length magic cube magic square mathematical mathematicians means method metic minus monistic multiplication namely natural negative numbers number-pictures numeral words numerical quadrature obtained operations phenomena plane point-aggregate polygon position possess possible principle problem PROF quadrature rational number rectification results of counting root rows side solution solvable solve space of experience sphere spirits spiritualistic straight edge straight line surface symbol theory things three dimensions three-dimensional three-dimensional space tion triangle truth two-dimensional whole numbers zero Zöllner