Pink triangle identity, and was incorporated into the logos of such organizations and businesses. It was also used by individuals, sometimes discretely or ambiguously as an "insider" code unfamiliar to the general public. The logo for the 1987 March on Washington for Lesbian and Gay Rights was a silhouette of the US Capitol Dome superimposed over a pink triangle. Taking a more militant tone, the AIDS Coalition To Unleash Power (ACT UP) was formed by six gay activists in New York City in 1987, and to draw attention to the disease's disproportionate impact on gay and bisexual men, and the apparent role
Wythoff symbol and formula_7, represent the corners of the Schwarz triangle used in the construction, which are formula_8, formula_9 and formula_10 radians respectively. The triangle is also represented with the same numbers, written formula_11. The vertical bar in the symbol specifies a categorical position of the generator point within the fundamental triangle according to the following: In this notation the mirrors are labeled by the reflection-order of the opposite vertex. The formula_18 values are listed "before" the bar if the corresponding mirror is active. The one "impossible" symbol formula_19 implies the generator point is on all mirrors, which is only possible if