Posted by **bilish** on Saturday, March 28, 2009 at 11:22am.

what are magic squares?

what is mathematical logic?

- math -
**PsyDAG**, Saturday, March 28, 2009 at 12:25pm
Since this is not my area of expertise, I searched Google under the key words "*mathematical logic*" to get these possible sources:

http://en.wikipedia.org/wiki/Mathematical_logic

http://www.math.psu.edu/simpson/courses/math557/logic.pdf

You can do the same under "math magic squares".

In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.

I hope this helps. Thanks for asking.

- maths -
**Reiny**, Saturday, March 28, 2009 at 2:19pm
ahhh, magic squares, one of my favourite topics in recreational math

they have been known for hundreds of years,

Antonio Gaudi incorporated a 4x4 magic square in his famous basilica in Barcelona

http://www.pballew.net/magsquar.html

and Albrecht Duerer had a differengt 4x4 in one of his illustrations

http://www-groups.dcs.st-and.ac.uk/~history/Diagrams/Melancholia.jpeg

http://www-groups.dcs.st-and.ac.uk/~history/Diagrams/Durers_square.jpeg

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