**Mathematics**

- Algebraic cycle and Hodge cycle, homology classes in algebraic geometry
- Cycle (algebraic topology), a simplicial chain with zero boundary
- Cycle (graph theory), a nontrivial path in a graph from a node to itself
- Cycle (mathematics), a basic permutation (all permutations are products of cycles)
- Cyclic (mathematics) shows other terms in mathematics beginning with cyclic or cycle

- Turn (geometry) or cycle, a unit of plane angle equal to 360 degrees

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### Famous quotes containing the word mathematics:

“I must study politics and war that my sons may have liberty to study *mathematics* and philosophy.”

—John Adams (1735–1826)

“Why does man freeze to death trying to reach the North Pole? Why does man drive himself to suffer the steam and heat of the Amazon? Why does he stagger his mind with the *mathematics* of the sky? Once the question mark has arisen in the human brain the answer must be found, if it takes a hundred years. A thousand years.”

—Walter Reisch (1903–1963)