The @ symbol was not used in continental Europe and the committee expected it would be replaced by an accented À in the French variation, so the @ was placed in position 40 < sub > hex </ sub > next to the letter A.

These states are labeled by a set of quantum numbers summarized in the term symbol and usually associated with particular electron configurations, i. e., by occupation schemes of atomic orbitals ( e. g., 1s < sup > 2 </ sup > 2s < sup > 2 </ sup > 2p < sup > 6 </ sup > for the ground state of neon -- term symbol: < sup > 1 </ sup > S < sub > 0 </ sub >).

where we use the symbol k to denote the quantum numbers p and σ of the previous section and the sign of the energy, E ( k ), and a < sub > k </ sub > denotes the corresponding annihilation operators.

Different isotopes of a given element are distinguished by their mass numbers, which are conventionally written as a super-index on the left hand side of the atomic symbol ( e. g., < sup > 238 </ sup > U ).

* Before the first assembly on a newly setup RDOS system, the macro assembler ’ s default symbol definitions need to be configured using the following command: < tt >< u > mac / s nbid osid nsid paru </ tt ></ u >

The transform is sometimes denoted by the symbol, as in or or < ref group =" note "> As a linear transformation on a finite-dimensional vector space, the DFT expression can also be written in terms of a DFT matrix ; when scaled appropriately it becomes a unitary matrix and the X < sub > k </ sub > can thus be viewed as coefficients of x in an orthonormal basis .</ ref >

The Eocene ( symbol E < sub > O </ sub >) epoch, lasting from about 56 to 34 million years ago ( to ), is a major division of the geologic timescale and the second epoch of the Paleogene Period in the Cenozoic Era.

The amount of charge is usually given the symbol Q and expressed in coulombs ; each electron carries the same charge of approximately − 1. 6022 × 10 < small >< sup >− 19 </ sup ></ small > coulomb.

The conversion to kelvins ( symbol: uppercase K ) is defined by using k < sub > B </ sub >, the Boltzmann constant:

Electronegativity, symbol < span class =" nounderlines "> χ </ span >, is a chemical property that describes the tendency of an atom or a functional group to attract electrons ( or electron density ) towards itself.

The mechanical ellipticity of the Earth ( dynamical flattening, symbol J < sub > 2 </ sub >) can be determined to high precision by observation of satellite orbit perturbations.

If the symbol width is n, the codes of width n + 1 fall naturally into two blocks: the lower block of 2 < sup > n </ sup > codes for coding single symbols, and the upper block of 2 < sup > n </ sup > codes that will be used by the decoder for sequences of length greater than one.

The most common isotope of hydrogen is protium ( name rarely used, symbol < sup > 1 </ sup > H ) with a single proton and no neutrons.

where the angular rotation of the frame is expressed by the vector Ω pointing in the direction of the axis of rotation, and with magnitude equal to the angular rate of rotation Ω, symbol × denotes the vector cross product, vector x < sub > B </ sub > locates the body and vector v < sub > B </ sub > is the velocity of the body according to a rotating observer ( different from the velocity seen by the inertial observer ).

If the symbol < tt >/</ tt > is chosen, for example, then the number seven would be represented by < tt >///////</ tt >.

On the standard US keyboard layout, the < tt >#</ tt > symbol is.

On standard UK and some European keyboards, the same keystrokes produce the pound currency symbol (< tt >£</ tt >), and < tt >#</ tt > is moved to a separate key above the right shift.

The bullet symbol is also generated by in GUI applications, but < tt > Alt + 7 </ tt > in a Windows text interface ( such as a Win32 console application ) it generates ( the bell character ).

The symbol "< tt > CR </ tt >" denotes a carriage return ( usually generated by a keyboard's " Enter " key ).

However, < tt > cat </ tt > with one named file is safer where human error is a concern — one wrong use of the default redirection symbol ">" instead of "<" ( often adjacent on keyboards ) may permanently delete the file you were just needing to read.

The production ( say P (< tt > H </ tt >)) assigned to the halting symbol is seen below to play no role in computations, but for convenience is taken to be P (< tt > H </ tt >)

The symbol in the International Phonetic Alphabet that represents this sound is ⟨⟩, and the equivalent X-SAMPA symbol is < tt > k </ tt >.

The ampere ( SI unit symbol: A ), often shortened to amp, is the SI unit of electric current ( quantity symbol: I, i ) and is one of the seven SI base units.

The flow of electrons is always from anode to cathode outside of the cell or device, regardless of the cell or device type and operating mode, with the exception of diodes, where electrode naming always assumes current in the forward direction ( that of the arrow symbol ), i. e., electrons flow in the opposite direction, even when the diode reverse-conducts either by accident ( breakdown of a normal diode ) or by design ( breakdown of a Zener diode, photo-current of a photodiode or solar cell ).

Moreover ( and more embarrassingly, although this is essentially trivial ), mathematicians usually write the dual entity not at the first place, as the physicists do, but at the second one, and they don't use the *- symbol, but an overline ( which the physicists reserve to averages ) to denote conjugate-complex numbers, i. e. for scalar products mathematicians usually write

A formal grammar defines ( or generates ) a formal language, which is a ( usually infinite ) set of finite-length sequences of symbols ( i. e. strings ) that may be constructed by applying production rules to another sequence of symbols which initially contains just the start symbol.

and start symbol, defines the language of all words of the form ( i. e. copies of followed by copies of ).

We axiomatize predicate calculus without equality, i. e. there are no special axioms expressing the properties of equality as a special relation symbol.

* The lowercase iota symbol is sometimes used to write the imaginary unit, but more often Roman i or j is used.

More broadly the term is used in a wide number of contexts for an image, picture, or representation ; it is a sign or likeness that stands for an object by signifying or representing it either concretely or by analogy, as in semiotics ; by extension, icon is also used, particularly in modern culture, in the general sense of symbol — i. e. a name, face, picture, edifice or even a person readily recognized as having some well-known significance or embodying certain qualities: one thing, an image or depiction, that represents something else of greater significance through literal or figurative meaning, usually associated with religious, cultural, political, or economic standing.

The unit symbol kb is typographically similar to unit symbols of the kilobyte, i. e. kB, with an upper case B.

That is, a statement such as ( i. e. the assignment of the result of an expression to a variable ) clearly calls for the expression to be evaluated and the result placed in, but what actually is in is irrelevant until there is a need for its value via a reference to in some later expression whose evaluation could itself be deferred, though eventually the rapidly growing tree of dependencies would be pruned to produce some symbol rather than another for the outside world to see.

( e. g. LIDAR mapping ) but in fact it is not mapping because a map is created through some cartographic works ( i. e. determining the scale / level of detail and content of geographic or cartographic database, entry criteria and symbol specification for geospatial objects, generalization, layout design etc .).

Since each tone ( i. e., symbol ) represents a message consisting of two digital bits in this example, the bit rate is twice the symbol rate, i. e. 2000 bits per second.

where n is a natural number, the coefficients are elements of R, and X is a formal symbol, whose powers X < sup > i </ sup > are just placeholders for the corresponding coefficients a < sub > i </ sub >, so that the given formal expression is just a way to encode the sequence, where there is an n such that a < sub > i </ sub > = 0 for all i > n. Two polynomials sharing the same value of n are considered equal if and only if the sequences of their coefficients are equal ; furthermore any polynomial is equal to any polynomial with greater value of n obtained from it by adding terms in front whose coefficient is zero.

The torr ( symbol: Torr ) is a non-SI unit of pressure with the ratio of 760 to 1 standard atmosphere, chosen to be roughly equal to the fluid pressure exerted by a millimeter of mercury, i. e., a pressure of 1 torr is approximately equal to one millimeter of mercury.

< li > A finite table ( occasionally called an action table or transition function ) of instructions ( usually quintuples: q < sub > i </ sub > a < sub > j </ sub >→ q < sub > i1 </ sub > a < sub > j1 </ sub > d < sub > k </ sub >, but sometimes 4-tuples ) that, given the state ( q < sub > i </ sub >) the machine is currently in and the symbol ( a < sub > j </ sub >) it is reading on the tape ( symbol currently under the head ) tells the machine to do the following in sequence ( for the 5-tuple models ):

Its symbol is ΔH < sub > f </ sub >< sup >< s > O </ s ></ sup > or Δ < sub > f </ sub > H < sup >< s > O </ s ></ sup >.

The numero sign is not a typographic symbol character, but the word número ( number ) abbreviated per the Spanish typographic convention of superior letters — letras voladas ( flying letters ) and voladitas ( little flying letters ) — wherein the final letter ( s ) of the abbreviated word are written as underlined lower-case superscripts: n < sup >< u > o </ u ></ sup > and N < sup >< u > o </ u ></ sup > ( singular ), n < sup >< u > os </ u ></ sup > and N < sup >< u > os </ u ></ sup > ( plural ), which is in the same fashion as other flying letters like F < sup >< u > co </ u ></ sup > for Francisco ; M < sup >< u > a </ u ></ sup > for María ; f < sup >< u > do </ u ></ sup > for firmado ( signed ).

A red star, five-pointed and filled (< big >< span style =" color: red ">★</ span ></ big >), is an important ideological and religious symbol which has been used for various purposes, such as: state emblems, flags, monuments, ornaments, and logos.

Although the STB changed their logo in 1997, the STB Act continues to protect the Merlion symbol .< ref > Singapore Tourism Board: " Use of the Merlion Symbol " < http :// app-stg. stb. gov. sg / asp / form / form01. asp ></ ref > Approval must be received from STB before it can be used.

In physics, bottomness ( symbol B ′) also called beauty, is a flavour quantum number reflecting the difference between the number of bottom antiquarks ( n < sub ></ sub >) and the number of bottom quarks ( n < sub ></ sub >) that are present in a particle:

In N-dimensional space-time, the Levi-Civita symbol may be regarded as either a rank-N covariant ( odd ) authentic tensor density of weight − 1 ( ε < sub > α < sub > 1 </ sub >… α < sub > N </ sub ></ sub >) or a rank-N contravariant ( odd ) authentic tensor density of weight + 1 ( ε < sup > α < sub > 1 </ sub >… α < sub > N </ sub ></ sup >).

The symbol (" if ") is dropped if < code >< body ></ code > is empty ; such rules are called facts.

< http :// investing. businessweek. com / research / stocks / transactions / transactions. asp? symbol = 1005. HK ></ ref > On August 19, 2011, Code 3 Collectibles announced that it was stopping all production.

This is often represented by the symbol Δ < sub > at </ sub > H < sup >< s > o </ s ></ sup > or ΔH < sub > at </ sub >< sup >< s > o </ s ></ sup >.