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math.txt
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============================== MATHEMATICS =================================
Basic operations: +±÷ *×·
Diagonal parts: / \
Comparisons: <>≤≥=≠≡≈
Misc: √ ∟⌐¬¬ ƒ∂ ∞ ∩ ∫⌠⌡
=== PLUS & MULTIPLY ===
U+002B OK!
8x8
........ C-64 / Amiga / PC / Windows / CPC / Atari 400/800/ST / BBC
...##... No one bothers to deviate from the perfect shape.
...##...
.######.
...##...
...##...
........
........
8x16
........ X11 height to match original (also consistent with *).
........ PC/Win shape is 2 lines shorter.
........
........
...##...
...##...
...##...
.######.
...##...
...##...
...##...
........
........
........
........
........
U+00B1
8x8
...##... Identical in Amiga, PC and ST.
...##... Amstrad has no space between + and -.
.######.
...##...
...##...
........
.######.
........
8x16
........ Horizontal line positions retained.
........
........
........
...##...
...##...
...##...
.######.
...##...
...##...
...##...
........
.######.
........
........
........
U+2213
8x8
.######. From Funscii
........
...##...
...##...
.######.
...##...
...##...
........
8x16
........
........
........
........
.######.
........
...##...
...##...
...##...
.######.
...##...
...##...
...##...
........
........
........
U+2214
8x8
...##... From Funscii
........
...##...
...##...
.######.
...##...
...##...
........
8x16
........
........
........
...##...
...##...
........
...##...
...##...
...##...
.######.
...##...
...##...
...##...
........
........
........
U+002A OK!
8x8
........ C-64 / Amiga / PC / Windows / Amstrad / Atari 400/800/ST
.##..##.
..####..
########
..####..
.##..##.
........
........
8x16
........
........ PC/Windows/X11 all have 2+1+2.
........ Windows shape is also 1 column narrower.
........ We'll keep this shape for line connectivity.
.##..##. Shorter shape would also diverge from original too much.
.##..##. PC/Windows are adjusted to horizontal line pos -> so are we.
..####..
########
..####..
.##..##.
.##..##.
........
........
........
........
........
U+00D7
8x8
........
........
.##.##..
..###...
.##.##..
........
........
........
8x16
........ Windows shape followed. Adjusted to horizontal line pos.
........
........
........
#.....#.
##...##.
.##.##..
..###...
.##.##..
##...##.
#.....#.
........
........
........
........
........
U+00F7
8x8
...##... Amstrad/ST. PC shape identical but positioned differently.
...##... Amiga shape is in the same position but the dots are 2x1.
........
.######.
........
...##...
...##...
........
8x16
........ VGA/Windows.
........
........
........
...##...
...##...
........
.######.
........
...##...
...##...
........
........
........
........
........
=== DIAGONAL PARTS ===
U+002F OK!
8x8
......## Amiga. Chosen because of prominence in Ascii art.
.....##. C-64 shape is 1 line shorter.
....##.. PC, Windows and Amstrad drop one column, ST drops two.
...##... Atari 400/800 drops two columns and one line,
..##.... BBC drops two lines.
.##.....
##......
........
8x16
......## We need graphics compatibility.
......## Windows/X11 shapes have similar angle but are shorter.
.....##. PC shape is an exception with its 45-degree angle.
.....##.
....##..
....##..
...##...
...##...
..##....
..##....
.##.....
.##.....
##......
##......
........
........
U+005C OK!
8x8
##...... Amiga, just like in /.
.##..... No alternatives provided to ensure graphic compatibility.
..##.... PC/Win shape drops 1 column, like in /.
...##...
....##..
.....##.
......##
........
8x16
##...... As in /.
##......
.##.....
.##.....
..##....
..##....
...##...
...##...
....##..
....##..
.....##.
.....##.
......##
......##
........
........
=== EQUALITIES ===
U+003D OK!
8x8
........ Amiga / C-64 / Windows / BBC.
........ The lines are symmerically around -.
.######.
........
.######.
........
........
........
8x16
........
........
........
........
........
.######. PC/X11 have 2-line gap. Windows has 1-line gap.
........ We want to retain symmetry around the 8th line (-).
........ 1-line gap would make it too divergent from original
........ as well as inconsistent with + and *.
.######.
........
........
........
........
........
........
=== LOGIC ===
U+00AC
8x8
........ PC/CPC shape moved closer to the Amiga position
.######. in order to make Amiga ascii work better.
.....##. Amiga shape has 1 pixel shorter lines.
.....##. Atari ST has shorter horizontal but longer vertical line.
........
........
........
........
8x16
........
........
........
........
........
........
#######.
.....##.
.....##.
.....##.
.....##.
........
........
........
........
........
=== MATH VERSIONS OF GREEK LETTERS ===
U+00B5 MICRO SIGN
8x8
........ PC shape, with height fixed to match other lowercasers.
........
.##..##.
.##..##.
.##..##.
.#####..
.##.....
##......
8x16
........
........
........
........
........
........
.##..##.
.##..##.
.##..##.
.##..##.
.##..##.
.##..##.
.#####..
.##.....
.##.....
##......
=== UNSORTED ===
U+221F
8x8
........ 224 pc
........ 225
##...... 226
##...... 227
##...... 228
#######. 229
........ 230
........ 231
8x16
........
........
........
........
........
........
#######.
.....##.
.....##.
.....##.
.....##.
........
........
........
........
........
U+221E INFINITY
8x8
........ 1888 PC with slight improvement as in U_VGA
........ 1889
.###.##. 1890
##.##.## 1891
##.##.## 1892
.##.###. 1893
........ 1894
........ 1895
8x16
........ Adapted like in PC. FSex uses 8x16.
........
........
........
........
.###.##.
##.##.##
##.##.##
##.##.##
.##.###.
........
........
........
........
........
........
U+2261
8x8
........ 1920 PC
.######. 1921
........ 1922
.######. 1923
........ 1924
.######. 1925
........ 1926
........ 1927
8x16
........ Follows PC gaps.
........
........
........
.######.
........
........
.######.
........
........
.######.
........
........
........
........
........
U+2265
8x8
..##.... pc
...##...
....##..
...##...
..##....
........
.######.
........
8x16
........ PC shape readjusted to horizontal lines.
........
........
........
..##....
...##...
....##..
.....##.
....##..
...##...
..##....
........
.######.
........
........
........
U+2264
8x8
....##.. pc
...##...
..##....
...##...
....##..
........
.######.
........
8x16
........ PC shape readjusted to horizontal lines.
........
........
........
....##..
...##...
..##....
.##.....
..##....
...##...
....##..
........
.######.
........
........
........
U+2248
8x8
........ PC. We already use the PC tilde and this one duplicates it.
.###.##.
##.###..
........
.###.##.
##.###..
........
........
8x16
........ Two tildes, as in 8x8.
........
........
........
.###..#.
##.#.##.
#..###..
........
.###..#.
##.#.##.
#..###..
........
........
........
........
........
U+207F
8x8
........ It's a lower-case character.
.####... Therefore it can't be as tall as numerals.
.##.##.. PC shape shortened by 1 row.
.##.##..
.##.##..
........
........
........
8x16
........
........
........
.####...
.##.##..
.##.##..
.##.##..
.##.##..
........
........
........
........
........
........
........
........
U+221A SQUARE ROOT
8x8
.......# Atari ST.
......## PC has to long right tail.
.....##. C-64 does not connect leftwards.
#...##..
##.##...
.###....
..#.....
........
8x16
........ Resembles U_VGA with slight connectivity improvements.
......##
......##
.....##.
.....##.
.....##.
.....##.
.....##.
##..##..
##..##..
.##.##..
..###...
...##...
........
........
........
U+23B7 RADICAL SYMBOL BOTTOM
8x8
......## Used to form graphical square roots. Drawn from scratch.
......## Defined as a terminal graphics character, so we include it.
......##
.....##.
..##.##.
...####.
....##..
........
8x16
......##
......##
......##
......##
......##
......##
.....##.
.....##.
.##..##.
.##..##.
..##.##.
...###..
....##..
........
........
........
U+2713
8x8
......#. C64 "square root" used as check mark.
.....##.
....##..
##.##...
####....
###.....
##......
........
U+1FBB1 INV 2713
U+XTND2 = 1FBB1
U+221B
8x8
.##..... From Funscii
...#...#
..#...##
...#.##.
.##.##..
##.##...
.###....
..#.....
8x16
........
.##...##
...#..##
..#..##.
...#.##.
.##..##.
.....##.
.....##.
##..##..
##..##..
.##.##..
..###...
...##...
........
........
........
U+221C
8x8
..#..... From Funscii
.##....#
#.#...##
####.##.
..#.##..
##.##...
.###....
..#.....
8x16
........
..#...##
.##...##
#.#..##.
####.##.
..#..##.
..#..##.
.....##.
##..##..
##..##..
.##.##..
..###...
...##...
........
........
........
U+2205 EMPTY SET
8x8
.....##. 1896 PC shape. CPC versions abandoned.
....##.. 1897
.######. 1898
##.##.## 1899
##.##.## 1900
.######. 1901
.##..... 1902
##...... 1903
8x16
........ PC
........
........
......##
.....##.
.######.
##.##.##
##.##.##
####..##
.######.
.##.....
##......
........
........
........
........
====== MULTISTOREY MATH ======
U+2320
8x8
....###. PC
...##.##
...##.##
...##...
...##...
...##...
...##...
...##...
8x16
........
........
....###.
...##.##
...##.##
...##.##
...##...
...##...
...##...
...##...
...##...
...##...
...##...
...##...
...##...
...##...
U+23AE
8x8
...##...
...##...
...##...
...##...
...##...
...##...
...##...
...##...
U+2321
8x8
...##... PC
...##...
...##...
...##...
...##...
##.##...
##.##...
.###....
8x16
...##...
...##...
...##...
...##...
...##...
...##...
...##...
...##...
...##...
##.##...
##.##...
##.##...
.###....
........
........
........
U+23B2
8x8
#######.
##......
##......
.##.....
..##....
...##...
....##..
.....##.
U+23B3
8x8
.....##.
....##..
...##...
..##....
.##.....
##......
########
........
See also: punctuation.txt multistorey brackets