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.
[edit on Wikidata] Spondylolisthesis is the forward displacement of a vertebral bone in relation to the natural curve of the spine, most commonly occurring after a fracture, and most often the fifth lumbar vertebra. Backward displacement is referred to as retrolisthesis.