+**Euler Theorem** is a cornerstone of [Number Theory](/wiki/Number_Theory), extending [Fermat's Little Theorem](/wiki/Fermat's_Little_Theorem). It asserts that for any integer *a* coprime to *n*, *a* raised to the power of Euler's totient function of *n* is congruent to 1 modulo *n*, playing a vital role in [Modular Arithmetic](/wiki/Modular_Arithmetic).
+## See also
+- [Euler's Totient Function](/wiki/Euler's_Totient_Function)
+- [Fermat's Little Theorem](/wiki/Fermat's_Little_Theorem)
+- [Modular Arithmetic](/wiki/Modular_Arithmetic)
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