A magic square in which the elements in each corner have the same sum. Dürer's
magic square, illustrated above, is an example of a gnomon magic square since
the sums in any of the four quadrants (as well as the sum of the middle four numbers)
are all 34 (Hunter and Madachy 1975, p. 24).
Hunter, J. A. H. and Madachy, J. S. Mathematical
Diversions. New York: Dover, 1975.Stapleton, H. E. "The
Gnomon as a Possible Link between (a) One Type of Mesopotamian Ziggurat and
(b) the Magic Square Numbers on Which Jaribian Alchemy Was Based." Ambix:
J. Soc. Study Alchemy and Early Chem.6, 1-9, 1957-1958.
magic square in which the elements in each 
corner have the same sum. Dürer's
magic square, illustrated above, is an example of a gnomon magic square since
the sums in any of the four quadrants (as well as the sum of the middle four numbers)
are all 34 (Hunter and Madachy 1975, p. 24).
