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.
ankylosing spondylitis (Bekhterev's spondylitis) a form of rheumatoid arthritis that affects the spine, characterized by inflammation of the facet joints and inflammatory changes of the stabilizing ligaments of the spine (enthesopathy).It affects males almost exclusively.nkylosing spondylitis. n. Arthritis of the spine, resembling rheumatoid arthritis and leading to lipping or fusion of the vertebrae. Also called Struempell-StrÃ¼mpell marie, Disease-Marie struempell, strÃ¼mpell disease, Rheumatoid-Spondylitis struempell. strÃ¼mpell marie disease