Update 'mathematics.md'

mathematics.md

@@ -8,6 +8,7 @@
 - [COMPUTABLE ALGEBRA, GENERAL THEORY AND
 THEORY OF COMPUTABLE FIELDS - Rabin](https://www.ams.org/journals/tran/1960-095-02/S0002-9947-1960-0113807-4/S0002-9947-1960-0113807-4.pdf)
 -[BGP Protocol]https://en.wikipedia.org/wiki/Border_Gateway_Protocol
+-[Internet Exchange Point](https://en.wikipedia.org/wiki/Internet_exchange_point)
 
 
 #  Mathematics