Geodesic
Celtic Knots and Greatest Common Divisor
According to the curriculum for the fifth grade, divisibility of integers is a topic in the first term. As a preparation for working with rational numbers, pupils learn notions of greatest common divisor and least common multiple of given numbers. An opportunity to give a lecture which stands apart from this demanding material arises after the introduction of the greatest common divisor. The lecture we are talking about was invented by the author and was inspired by mirror curves and Celtic knots.
Classification : 97U30 97D80 97D40
Keywords: divisibility, great common divisor, mirror curves 
@article{VM_2014_16_1_a9,
     author = {Dejana Vojinovi\'c},
     title = {Celtic {Knots} and {Greatest} {Common} {Divisor}},
     journal = {Visual Mathematics},
     publisher = {mathdoc},
     volume = {16},
     number = {1},
     year = {2014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/VM_2014_16_1_a9/}
}
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Dejana Vojinović. Celtic Knots and Greatest Common Divisor. Visual Mathematics, Tome 16 (2014) no. 1. http://geodesic.mathdoc.fr/item/VM_2014_16_1_a9/