Symbols:D
deci-
- $\mathrm d$
The Système Internationale d'Unités symbol for the metric scaling prefix deci, denoting $10^{\, -1 }$, is $\mathrm { d }$.
Its $\LaTeX$ code is \mathrm {d} .
deka-
- $\mathrm {da}$
The Système Internationale d'Unités symbol for the metric scaling prefix deka, denoting $10^{\, 1 }$, is $\mathrm { da }$.
Its $\LaTeX$ code is \mathrm {da} .
Hexadecimal
- $\mathrm D$ or $\mathrm d$
The hexadecimal digit $13$.
Its $\LaTeX$ code is \mathrm D or \mathrm d.
Roman Numeral
- $\mathrm D$ or $\mathrm d$
The Roman numeral for $500$.
Its $\LaTeX$ code is \mathrm D or \mathrm d.
Integral Domain
- $D$
Used as a variable denoting the general integral domain.
Integral Domain as Algebraic Structure
- $\struct {D, +, \circ}$
The full specification for an integral domain, where $+$ and $\circ$ are respectively the ring addition and ring product operations.
Its $\LaTeX$ code is \struct {D, +, \circ} .
Ordered Integral Domain
- $\struct {D, +, \circ, \le}$
This specifies an ordered integral domain which is totally ordered by the ordering $\le$.
Its $\LaTeX$ code is \struct {D, +, \circ, \le} .
Non-Zero Elements of Integral Domain
- $D^*$
Let $\struct {D, +, \circ}$ be an integral domain whose zero is $0_D$.
Then $D^*$ denotes the set $D \setminus \set {0_D}$.
Its $\LaTeX$ code is D^* .
Non-Negative Elements of Ordered Integral Domain
- $D_+$
Let $\struct {D, +, \circ, \le}$ be an ordered integral domain whose zero is $0_D$.
Then $D_+$ denotes the set $\set {x \in D: 0_D \le x}$, that is, the set of all positive (that is, non-negative) elements of $D$.
Its $\LaTeX$ code is D_+ .
Positive Elements of Ordered Integral Domain
- $D_+^*$
Let $\struct {D, +, \circ, \le}$ be an ordered integral domain whose zero is $0_D$.
Then $D_+^*$ denotes the set $\set {x \in D: 0_D < x}$, that is, the set of all strictly positive elements of $D$.
Some sources denote this as $D^+$, but this style of notation makes it difficult to distinguish between this and $D_+$.
Its $\LaTeX$ code is D_+^* .
Decimetre
- $\mathrm {dm}$
The symbol for the decimetre is $\mathrm {dm}$:
Its $\LaTeX$ code is \mathrm {dm} .
Pennyweight
- $\mathrm {dwt}$
The symbol for the pennyweight is $\text{dwt}$.
This derives from the Latin denarius, which evolved into the (old) penny.
Its $\LaTeX$ code is \mathrm {dwt} .
Electric Displacement Field
- $\mathbf D$
The electric displacement field is a vector quantity defined as the electric field strength multiplied by the permittivity of the medium through which it passes:
- $\mathbf D = \varepsilon \mathbf E$
where:
- $\varepsilon$ is the permittivity of the medium
- $\mathbf E$ is the electric field strength
Its $\LaTeX$ code is \mathrm D .