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Dave Keenan & Douglas Blumeyer's guide to RTT/Conventions for names, variables, units, and notations: Difference between revisions

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{| class="wikitable mw-collapsible mw-collapsed"
{| class="wikitable mw-collapsible mw-collapsed"
! scope="col" width="130px" |Compose-key sequence
! scope="col" width="130px" | ompose-key sequence
! scope="col" width="75px" |Resulting text
! scope="col" width="75px" | Resulting text
!Description
! Description
| -
|-
! colspan="3" rowspan="1" | Keyboard key symbols
! colspan="3" rowspan="1" | Keyboard key symbols
| -
|-
| ⎄⎄⎄
| ⎄⎄⎄
| ⎄
| ⎄
| Compose key symbol (the right alt key by default)
| Compose key symbol (the right alt key by default)
| -
|-
| ⎄\␣
| ⎄\␣
| ␣
| ␣
| Spacebar symbol
| Spacebar symbol
| -
|-
| ⎄\▶︎ etc.
| ⎄\▶︎ etc.
| ▶︎ etc.
| ▶︎ etc.
| Right etc. arrow key symbols
| Right etc. arrow key symbols
| -
|-
| ⎄\A or ⎄\O
| ⎄\A or ⎄\O
| ⌥
| ⌥
| Alt or option key symbol
| Alt or option key symbol
| -
|-
| ⎄\B
| ⎄\B
| ⌫
| ⌫
| Backspace key symbol
| Backspace key symbol
| -
|-
| ⎄\C
| ⎄\C
| ✲
| ✲
| Control key symbol
| Control key symbol
| -
|-
| ⎄\D
| ⎄\D
| ⌦
| ⌦
| Delete key symbol
| Delete key symbol
| -
|-
| ⎄\E
| ⎄\E
| ⎋
| ⎋
| Escape key symbol
| Escape key symbol
| -
|-
| ⎄\L
| ⎄\L
| ⇪
| ⇪
| Caps lock key symbol
| Caps lock key symbol
| -
|-
| ⎄\R or ⎄\.E
| ⎄\R or ⎄\.E
| ⏎
| ⏎
| Return or enter key symbol
| Return or enter key symbol
| -
|-
| ⎄\S
| ⎄\S
| ⇧
| ⇧
| Shift key symbol
| Shift key symbol
| -
|-
| ⎄\T
| ⎄\T
| ⭾
| ⭾
| Tab key symbol
| Tab key symbol
| -
|-
| ⎄()
| ⎄()
| ◌
| ◌
| Dotted circle, represents any character (such as the character preceding a combining mark)
| Dotted circle, represents any character (such as the character preceding a combining mark)
| -
|-
! colspan="3" rowspan="1" | Double key sequences
! colspan="3" rowspan="1" | Double key sequences
| -
|-
| ⎄␣␣
| ⎄␣␣
|  
|  
| Narrow no-break space (used between quantities and their units)
| Narrow no-break space (used between quantities and their units)
| -
|-
| ⎄..
| ⎄..
| ·
| ·
| Middle dot (used to multiply units when juxtaposition is ambiguous)
| Middle dot (used to multiply units when juxtaposition is ambiguous)
| -
|-
| ⎄::
| ⎄::
| ÷
| ÷
| Divide sign
| Divide sign
| -
|-
| ⎄;;
| ⎄;;
| ◌̲̅
| ◌̲̅
| Combining overline and low line (undirected value)
| Combining overline and low line (undirected value)
| -
|-
| <nowiki>⎄| | </nowiki>
| <nowiki>⎄| | </nowiki>
| ‖
| ‖
| Power norm bracket
| Power norm bracket
| -
|-
| ⎄<<
| ⎄<<
| ⟨
| ⟨
| Left angle bracket
| Left angle bracket
| -
|-
| ⎄>>
| ⎄>>
| ⟩
| ⟩
| Right angle bracket
| Right angle bracket
| -
|-
| ⎄~~
| ⎄~~
| ≈
| ≈
| Approximately equal
| Approximately equal
| -
|-
| ⎄**
| ⎄**
| ★
| ★
| Black star
| Black star
| -
|-
| ⎄<nowiki>''</nowiki>
| ⎄<nowiki>''</nowiki>
| ′
| ′
| Prime mark
| Prime mark
| -
|-
| ⎄11
| ⎄11
| ⁻¹
| ⁻¹
| Power of -1 or inverse
| Power of -1 or inverse
| -
|-
| ⎄22 through ⎄77
| ⎄22 through ⎄77
| ² ³ ⁴ ⁵ ⁶ ⁷
| ² ³ ⁴ ⁵ ⁶ ⁷
| Squared, cubed, fourth through seventh power
| Squared, cubed, fourth through seventh power
| -
|-
| ⎄88
| ⎄88
| ∞
| ∞
| Infinity
| Infinity
| -
|-
| ⎄00
| ⎄00
| °
| °
| Degree sign
| Degree sign
| -
|-
| ⎄nn
| ⎄nn
| ⁿ
| ⁿ
| Superscript small n
| Superscript small n
| -
|-
| ⎄--
| ⎄--
| ₋
| ₋
| Subscript minus sign
| Subscript minus sign
| -
|-
| ⎄__
| ⎄__
| ◌̲
| ◌̲
| Combining low line (underline)
| Combining low line (underline)
| -
|-
| ⎄==
| ⎄==
| ≡
| ≡
| Modular congruence
| Modular congruence
| -
|-
| ⎄//
| ⎄//
| ⁄
| ⁄
| Fraction slash (use with super and subscripts to create fractions)
| Fraction slash (use with super and subscripts to create fractions)
| -
|-
| ⎄##
| ⎄##
| ♯
| ♯
| Musical sharp
| Musical sharp
| -
|-
| ⎄bb
| ⎄bb
| ♭
| ♭
| Musical flat
| Musical flat
| -
|-
| ⎄dd
| ⎄dd
| ∂
| ∂
| Partial derivative
| Partial derivative
| -
|-
| ⎄ff
| ⎄ff
| ϕ
| ϕ
| Small phi symbol
| Small phi symbol
| -
|-
| ⎄gg
| ⎄gg
| ɡ
| ɡ
| Single-storey (opentail) small g
| Single-storey (opentail) small g
| -
|-
| ⎄ll
| ⎄ll
| ℓ
| ℓ
| Script small L
| Script small L
| -
|-
| ⎄uu
| ⎄uu
| µ
| µ
| Micro sign
| Micro sign
| -
|-
| ⎄xx
| ⎄xx
| ×
| ×
| Multiplication sign
| Multiplication sign
| -
|-
| ⎄DD
| ⎄DD
| ∆
| ∆
| Delta (small difference) operator
| Delta (small difference) operator
| -
|-
| ⎄FF
| ⎄FF
| Φ
| Φ
| Greek capital phi
| Greek capital phi
| -
|-
| ⎄QQ
| ⎄QQ
| Ϙ
| Ϙ
| Greek capital letter archaic qoppa (small quotient operator)
| Greek capital letter archaic qoppa (small quotient operator)
| -
|-
| ⎄TT
| ⎄TT
| ᵀ
| ᵀ
| Superscript capital T (matrix transpose)
| Superscript capital T (matrix transpose)
| -
|-
| ⎄++
| ⎄++
| ⁺
| ⁺
| Superscript plus sign (matrix pseudoinverse)
| Superscript plus sign (matrix pseudoinverse)
| -
|-
| ⎄▶︎▶︎ etc.
| ⎄▶︎▶︎ etc.
| → etc.
| → etc.
| Right etc. arrows
| Right etc. arrows
| -
|-
! colspan="3" rowspan="1" | Multiplication operators
! colspan="3" rowspan="1" | Multiplication operators
| -
|-
| ⎄xx
| ⎄xx
| ×
| ×
| Multiplication sign
| Multiplication sign
| -
|-
| ⎄Xx or ⎄xX
| ⎄Xx or ⎄xX
| ⨯
| ⨯
| Vector or cross product (barely distinguishable from multiplication sign)
| Vector or cross product (barely distinguishable from multiplication sign)
| -
|-
| ⎄XX
| ⎄XX
| ✕
| ✕
| Large multiplication sign (a better symbol for cross product)
| Large multiplication sign (a better symbol for cross product)
| -
|-
| ⎄x*
| ⎄x*
| ⋆
| ⋆
| Star operator (prefix: tensor complement, Hodge)
| Star operator (prefix: tensor complement, Hodge)
| -
|-
| ⎄X*
| ⎄X*
| ∗
| ∗
| Asterisk operator (infix: scalar product, Dorst)
| Asterisk operator (infix: scalar product, Dorst)
| -
|-
| ⎄x.
| ⎄x.
| ⋅
| ⋅
| Dot (product) operator
| Dot (product) operator
| -
|-
| ⎄X.
| ⎄X.
| •
| •
| Bullet (infix: fat dot product, Dorst)
| Bullet (infix: fat dot product, Dorst)
| -
|-
! colspan="3" rowspan="1" | Other operators
! colspan="3" rowspan="1" | Other operators
| -
|-
| ⎄v/
| ⎄v/
| √
| √
| Square root sign
| Square root sign
| -
|-
| ⎄3v/
| ⎄3v/
| ∛
| ∛
| Cube root sign
| Cube root sign
| -
|-
| ⎄4v/
| ⎄4v/
| ∜
| ∜
| Fourth root sign
| Fourth root sign
| -
|-
| ⎄-+
| ⎄-+
| ₊
| ₊
| Subscript plus sign
| Subscript plus sign
| -
|-
| ⎄--
| ⎄--
| ₋
| ₋
| Subscript minus sign
| Subscript minus sign
| -
|-
| ⎄-=
| ⎄-=
| ₌
| ₌
| Subscript equals sign
| Subscript equals sign
| -
|-
| ⎄++
| ⎄++
| ⁺
| ⁺
| Superscript plus sign (matrix pseudoinverse)
| Superscript plus sign (matrix pseudoinverse)
| -
|-
| ⎄+- or ⎄+=
| ⎄+- or ⎄+=
| ±
| ±
| Plus or minus sign
| Plus or minus sign
| -
|-
| ⎄=+
| ⎄=+
| ∓
| ∓
| Minus or plus sign
| Minus or plus sign
| -
|-
| ⎄=-
| ⎄=-
| −
| −
| Minus sign
| Minus sign
| -
|-
| ⎄==
| ⎄==
| ≡
| ≡
| Modular congruence
| Modular congruence
| -
|-
| ⎄/\
| ⎄/\
| ∧
| ∧
| Logical AND, wedge product, progressive product
| Logical AND, wedge product, progressive product
| -
|-
| ⎄\/
| ⎄\/
| ∨
| ∨
| Logical OR, vee product, regressive product
| Logical OR, vee product, regressive product
| -
|-
| ⎄⎄/\
| ⎄⎄/\
| ⋀
| ⋀
| Larger logical AND, wedge product, progressive product
| Larger logical AND, wedge product, progressive product
| -
|-
| ⎄⎄\/
| ⎄⎄\/
| ⋁
| ⋁
| Larger logical OR, vee product, regressive product
| Larger logical OR, vee product, regressive product
| -
|-
| <nowiki>⎄| _</nowiki>
| <nowiki>⎄| _</nowiki>
| ⌊
| ⌊
| Left floor (infix: right contraction, Dorst)
| Left floor (infix: right contraction, Dorst)
| -
|-
| <nowiki>⎄_| </nowiki>
| <nowiki>⎄_| </nowiki>
| ⌋
| ⌋
| Right floor (infix: left contraction, Dorst)
| Right floor (infix: left contraction, Dorst)
| -
|-
| <nowiki>⎄| ^</nowiki>
| <nowiki>⎄| ^</nowiki>
| ⌈
| ⌈
| Left ceiling
| Left ceiling
| -
|-
| <nowiki>⎄^| </nowiki>
| <nowiki>⎄^| </nowiki>
| ⌉
| ⌉
| Right ceiling
| Right ceiling
| -
|-
| ⎄'-
| ⎄'-
| ⨽
| ⨽
| Righthand interior product
| Righthand interior product
| -
|-
| ⎄-'
| ⎄-'
| ⨼
| ⨼
| (Lefthand) interior product
| (Lefthand) interior product
| -
|-
| ⎄-,
| ⎄-,
| ¬
| ¬
| Not sign (prefix: multivector complement)
| Not sign (prefix: multivector complement)
| -
|-
| ⎄⎄<>
| ⎄⎄<>
| ⋄
| ⋄
| Diamond operator (prefix: multivector dual)
| Diamond operator (prefix: multivector dual)
| -
|-
| ⎄(.)
| ⎄(.)
| ⨀
| ⨀
| Entrywise vector multiplication operator
| Entrywise vector multiplication operator
| -
|-
| ⎄(..)
| ⎄(..)
| ⊙
| ⊙
| Alternative entrywise vector multiplication operator
| Alternative entrywise vector multiplication operator
| -
|-
| ⎄(/)
| ⎄(/)
| ⊘
| ⊘
| Entrywise vector division operator
| Entrywise vector division operator
| -
|-
! colspan="3" | Mathematical letter and digit prefixes
! colspan="3" | Mathematical letter and digit prefixes
| -
|-
| ⎄3◌
| ⎄3◌
| я
| я
| Cyrillic, ⎄3q is ya (example)
| Cyrillic, ⎄3q is ya (example)
| -
|-
| ⎄4◌
| ⎄4◌
| ℵ
| ℵ
| Hebrew, ⎄4a is aleph (example)
| Hebrew, ⎄4a is aleph (example)
| -
|-
| ⎄5◌
| ⎄5◌
| 𝔞
| 𝔞
| Fraktur, ⎄5a
| Fraktur, ⎄5a
| -
|-
| ⎄6◌
| ⎄6◌
| ᵃ ¹  ᪲  ⁸
| ᵃ ¹  ᪲  ⁸
| Superscripts, ⎄6a ⎄61 ⎄688 ⎄68␣ (not all letters, some only approximate) (same key as ^ but without shift)
| Superscripts, ⎄6a ⎄61 ⎄688 ⎄68␣ (not all letters, some only approximate) (same key as ^ but without shift)
| -
|-
| ⎄68◌
| ⎄68◌
| ᵝ
| ᵝ
| Superscript greek, ⎄68b is superscript beta (only a few)
| Superscript greek, ⎄68b is superscript beta (only a few)
| -
|-
| ⎄7◌
| ⎄7◌
| 𝒶
| 𝒶
| Script, ⎄7a
| Script, ⎄7a
| -
|-
| ⎄8◌
| ⎄8◌
| α
| α
| Greek, ⎄8a is alpha (by sound where possible otherwise letter-shape)
| Greek, ⎄8a is alpha (by sound where possible otherwise letter-shape)
| -
|-
| ⎄8.◌
| ⎄8.◌
| ς
| ς
| Greek variants, ⎄8.s is final sigma
| Greek variants, ⎄8.s is final sigma
| -
|-
| ⎄9◌
| ⎄9◌
| 𝐚 𝟏 𝟓 𝟕 𝟖 𝟎
| 𝐚 𝟏 𝟓 𝟕 𝟖 𝟎
| Bold, ⎄9a ⎄91 ⎄95␣ ⎄97␣ ⎄98␣ ⎄90␣
| Bold, ⎄9a ⎄91 ⎄95␣ ⎄97␣ ⎄98␣ ⎄90␣
| -
|-
| ⎄95◌
| ⎄95◌
| 𝖆
| 𝖆
| Bold fraktur, ⎄95a
| Bold fraktur, ⎄95a
| -
|-
| ⎄97◌
| ⎄97◌
| 𝓪
| 𝓪
| Bold script, ⎄97a
| Bold script, ⎄97a
| -
|-
| ⎄98◌
| ⎄98◌
| 𝛂
| 𝛂
| Bold greek, ⎄98a is bold alpha
| Bold greek, ⎄98a is bold alpha
| -
|-
| ⎄90◌
| ⎄90◌
| 𝒂
| 𝒂
| Bold italic, ⎄90a
| Bold italic, ⎄90a
| -
|-
| ⎄908◌
| ⎄908◌
| 𝜶
| 𝜶
| Bold italic greek, ⎄908a is bold italic alpha
| Bold italic greek, ⎄908a is bold italic alpha
| -
|-
| ⎄0◌
| ⎄0◌
| 𝑎
| 𝑎
| Italic, ⎄0a
| Italic, ⎄0a
| -
|-
| ⎄08◌
| ⎄08◌
| 𝛼
| 𝛼
| Italic greek, ⎄08a is italic alpha
| Italic greek, ⎄08a is italic alpha
| -
|-
| ⎄-◌
| ⎄-◌
| ₐ ᴀ   ͚ ₈
| ₐ ᴀ   ͚ ₈
| Subscripts and small caps, ⎄-a ⎄-A ⎄-88 ⎄-8␣ (not all letters, some only approximate) (same key as _ but without shift)
| Subscripts and small caps, ⎄-a ⎄-A ⎄-88 ⎄-8␣ (not all letters, some only approximate) (same key as _ but without shift)
| -
|-
| ⎄-8◌
| ⎄-8◌
| ᵦ
| ᵦ
| Subscript greek, ⎄-8b is subscript beta (only a few)
| Subscript greek, ⎄-8b is subscript beta (only a few)
| -
|-
| ⎄{◌
| ⎄{◌
| 𝖺 𝟣 𝟫
| 𝖺 𝟣 𝟫
| Sans-serif, ⎄{a ⎄{1 ⎄{9␣
| Sans-serif, ⎄{a ⎄{1 ⎄{9␣
| -
|-
| ⎄{9◌
| ⎄{9◌
| 𝗮 𝟭
| 𝗮 𝟭
| Sans-serif bold, ⎄{9a ⎄{91
| Sans-serif bold, ⎄{9a ⎄{91
| -
|-
| ⎄}◌
| ⎄}◌
| 𝚊 𝟷
| 𝚊 𝟷
| Sonospace, ⎄}a ⎄}1
| Sonospace, ⎄}a ⎄}1
| -
|-
| <nowiki>⎄| ◌</nowiki>
| <nowiki>⎄| ◌</nowiki>
| 𝕒 𝟙 𝟠 𝟘
| 𝕒 𝟙 𝟠 𝟘
| <nowiki>Double-struck, ⎄| a ⎄| 1 ⎄| 8␣ ⎄| 0␣</nowiki>
| <nowiki>Double-struck, ⎄| a ⎄| 1 ⎄| 8␣ ⎄| 0␣</nowiki>
| -
|-
| <nowiki>⎄| 8◌</nowiki>
| <nowiki>⎄| 8◌</nowiki>
| ℼ
| ℼ
| <nowiki>Double-struck greek, ⎄| 8p (only a few)</nowiki>
| <nowiki>Double-struck greek, ⎄| 8p (only a few)</nowiki>
| -
|-
| <nowiki>⎄| 0◌</nowiki>
| <nowiki>⎄| 0◌</nowiki>
| ⅇ ⅈ
| ⅇ ⅈ
| <nowiki>Double-struck italic, ⎄| 0e ⎄| i (only a few)</nowiki>
| <nowiki>Double-struck italic, ⎄| 0e ⎄| i (only a few)</nowiki>
| -
|-
! colspan="3" rowspan="1" | Power statistics brackets
! colspan="3" rowspan="1" | Power statistics brackets
| -
|-
| <nowiki>⎄| | </nowiki>
| <nowiki>⎄| | </nowiki>
| ‖
| ‖
| Power-norm bracket
| Power-norm bracket
| -
|-
| <nowiki>⎄| -1</nowiki>
| <nowiki>⎄|-1</nowiki>
| ‖₁
| ‖₁
| 1-norm right bracket
| 1-norm right bracket
| -
|-
| <nowiki>⎄| -2</nowiki>
| <nowiki>⎄|-2</nowiki>
| ‖₂
| ‖₂
| 2-norm right bracket
| 2-norm right bracket
| -
|-
| <nowiki>⎄| -8</nowiki>
| <nowiki>⎄|-8</nowiki>
| ‖ ͚
| ‖ ͚
| ∞-norm right bracket
| ∞-norm right bracket
| -
|-
| ⎄⎄<<
| ⎄⎄<<
| ⟪
| ⟪
| Left power-mean bracket
| Left power-mean bracket
| -
|-
| ⎄⎄>>
| ⎄⎄>>
| ⟫
| ⟫
| Right power-mean bracket
| Right power-mean bracket
| -
|-
| <nowiki>⎄⎄{{</nowiki>
| <nowiki>⎄⎄{{</nowiki>
| ⧛
| ⧛
| Left power-sum bracket (substitute for {{llzigzag}} when HTML is not available)
| Left power-sum bracket (substitute for {{llzigzag}} when HTML is not available)
| -
|-
| <nowiki>⎄⎄}}</nowiki>
| <nowiki>⎄⎄}}</nowiki>
| ⧚
| ⧚
| Right power-sum bracket (substitute for {{rrzigzag}} when HTML is not available)
| Right power-sum bracket (substitute for {{rrzigzag}} when HTML is not available)
| -
|-
! colspan="3" rowspan="1" | Combining marks
! colspan="3" rowspan="1" | Combining marks
| -
|-
| ⎄\-
| ⎄\-
| ◌̶
| ◌̶
| Combining strike-thru
| Combining strike-thru
| -
|-
| ⎄^_
| ⎄^_
| ◌̅
| ◌̅
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