1 Know what a set and an element are. 2  Write a mathematical statement with an equal sign or an inequality.  Identify what numbers belong to the set of natural numbers, whole numbers, integers, rational numbers, irrational numbers, and real numbers.
Discogenic spondylosis, which is often thought of as a form of spinal osteoarthritis, refers to a degenerative condition that affects the joints of the spine.
Causes. Even though discogenic disease is not, by definition, a true disease, it still is a potentially life-altering condition. When the discs in your spine dry out, become brittle, bulge or become herniated, they can cause nerve pressure, which can result in pain, weakness, tingling, numbness and muscle weakness.