Garnet not like sapphire blue in subdued daylight but more reminiscent of the grayish blues and greenish blues sometimes seen in spinel. However, in white LED light, the color is equal to the best cornflower blue sapphire, or D block tanzanite; this is due to the blue garnet's ability to absorb the yellow component of the emitted light. Pyrope is an indicator mineral for high-pressure rocks. The garnets from mantle-derived rocks, peridotites, and eclogites commonly contain a pyrope variety. Spessartine or spessartite is manganese aluminium garnet, MnAl(SiO). Its name is derived from Spessart in Bavaria. It occurs most often in granite
Type theory of a function is denoted with an arrow formula_16 from the parameter type to the function's resulting type. Thus, formula_17. Calling or "applying" a function to an argument may be written with or without parentheses, so formula_18 or formula_12. Not using parentheses is more common, because multiple argument functions can be defined using currying. There are many different set theories and many different systems of type theory, so what follows are generalizations. The term formula_20 reduces to formula_21. Since formula_21 cannot be reduced further, it is called a normal form. A system of type theory is said to be strongly