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The "∅" symbol is always drawn as a slashed circle, whereas in most typefaces the letter "Ø" is a slashed ellipse. The diameter symbol ( ⌀ ) (Unicode character U+2300) is similar to the lowercase letter ø, and in some typefaces it even uses the same glyph , although in many others the glyphs are subtly distinguishable (normally, the ...
25A0 25B0 25C0 Symbol Name Symbol Name Symbol Name Last Hex# HTML Hex HTML Hex HTML Hex Dec Picture Dec Picture Dec Picture BLACK SQUARE: BLACK PARALLELOGRAM: : BLACK LEFT-POINTING TRIANGLE
circle with all but upper left quadrant black: u+25d5 left half black circle: u+25d6 right half black circle: u+25d7 inverse bullet: u+25d8 inverse white circle: u+25d9 upper half inverse white circle: u+25da lower half inverse white circle: u+25db upper left quadrant circular arc: u+25dc upper right quadrant circular arc: u+25dd lower right ...
SOGDIAN PUNCTUATION CIRCLE WITH DOT U+10F57: Po, other Sogdian མ SOGDIAN PUNCTUATION TWO CIRCLES WITH DOTS U+10F58: Po, other Sogdian ཙ SOGDIAN PUNCTUATION HALF CIRCLE WITH DOT U+10F59: Po, other Sogdian SOYOMBO MARK TSHEG U+11A9A: Po, other Soyombo SOYOMBO MARK SHAD U+11A9B: Po, other Soyombo SOYOMBO MARK DOUBLE SHAD U+11A9C ...
PR is the diameter of a circle centered on O; its radius AO is the arithmetic mean of a and b. Using the geometric mean theorem, triangle PGR's altitude GQ is the geometric mean. For any ratio a:b, AO ≥ GQ. A semicircle can be used to construct the arithmetic and geometric means of two lengths using straight-edge and compass.
It is often replaced by the word "or". 2. In lattice theory, denotes the join or least upper bound operation. 3. In topology, denotes the wedge sum of two pointed spaces. ∧ 1. Denotes the logical and, and is read as "and". If E and F are logical predicates, is true if E and F are both true.
Other, similar signs are in use in Armenian: the U+0559 ՙ ARMENIAN MODIFIER LETTER LEFT HALF RING and the U+055A ՚ ARMENIAN APOSTROPHE. Breve and inverted breve are also shaped like half rings, respectively, the bottom and top half of a circle.
Inverted breve or arch is a diacritical mark, shaped like the top half of a circle ( ̑ ), that is, like an upside-down breve (˘). It looks similar to the circumflex (ˆ), which has a sharp tip (Â â Ê ê Î î Ô ô Û û), while the inverted breve is rounded: (Ȃ ȃ Ȇ ȇ Ȋ ȋ Ȏ ȏ Ȗ ȗ).