CS395 Introduction to Discrete Structures

Prerequiste Glossary




congruent modulo k, mod k:
      equal up to an integer multiple of k, the difference is an integer multiple of k

divisible by an integer k:
      can be divided by k without producing a non-zero remainder, thus it is an integer multiple of k

even number:
      an integer that is divisible by 2. 0 is an even number


integer:
      a number without fraction part, a whole number


irrational number:
      a real number that is not a rational number; for example, the square roots of 2 are irrational numbers.

multiple of k:
      a number that can be divided by k without producing a non-zero remainder


natural number:
      a non-negative integer: 0, 1, 2, 3, ....


negative number:
      a number that is strictly less than 0


non-negative number:
      a number that is greater than or equal to 0


odd number:
      an integer that is not even, it is equal to an even number plus or minus 1


positive number:
      a number that is strictly greater than 0


rational number:
      a number that can be expressed as the quotient of two integers, m/n, where m and n are integers


real number:
      an integer or a fraction






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