Somewhat more formally, for a set Ï of properties and relations, a Ï-representation of some structure X is a structure Y that is the image of X under a s homomorphism that preserves Ï. The label representation is sometimes also applied to the homomorphism itself.
Melanoma. This cancer begins in the melanocytes, the cells that provide the skinâs color. Melanoma is one of the deadliest forms of skin cancer because it can spread rapidly inside the body. Approximately one American dies from melanoma every hour.
This is due to the protective effect of melanin, which gives skin its pigmentation. People with red hair, light complexions or freckles are also at a higher risk for developing melanoma. However, regardless of skin color, there is a risk factor when the skin is being exposed to UV rays.