Symbol in context

$A$

This entry links every published equation using this exact notation. Its meaning may change between equations.

Meanings in context

Article-grounded definition

Symbol A

the observable.

Read equation 4 in How Post-CMOS, Neuromorphic, Photonic, and Quantum AI Compute Actually Works →

Article-grounded definition

Symbol A

availability — the fraction of time the fleet is actually up and assigned to the job rather than down for failure, repair, or checkpoint recovery.

Read equation 1 in AI Accelerator Architecture in Practice: An Advanced Technical Guide →

Article-grounded definition

Symbol A

the forward projection operator.

Read equation 6 in How Mathematics, Proof, and Scientific Computation Actually Work →

Article-grounded definition

Symbol A

the objectively superior technology, and it can lock in permanently long before the alternative gets a fair trial.

Read equation 1 in Reactor Phylogenetics: The Family Tree of Fission Power →

Article-grounded definition

Symbol A

the fix the mass number.

Read equation 19 in The Valley of Stability Is a Fitness Landscape →

Article-grounded definition

Symbol A

a prefactor from fluctuations around that solution.

Read equation 11 in The Vacuum Has a History: Symmetry Breaking as Speciation →

Article-grounded definition

Symbol A

a taxon-specific growth constant.

Read equation 1 in The Longest Childhood: Life-History Theory and the Grandmother Bet →

Article-grounded definition

Symbol A

the ask set.

Read equation 3 in What Claude Code's Permission Model Actually Allows, in Plain Terms →

Article-grounded definition

Symbol A

trained.

Read equation 2 in Actually Deploying an Open-Weight Model in Production →

Article-grounded definition

Symbol A

at least as good on every axis and strictly better on at least one.

Read equation 9 in Why Cost and Latency Belong in the Evaluation Score, Not a Footnote →

Article-grounded definition

Symbol A

at least as good on every axis and strictly better on at least one: [displayed formula].

Read equation 12 in Why Cost and Latency Belong in the Evaluation Score, Not a Footnote →

Article-grounded definition

Symbol A

the agent.

Read equation 18 in Why Cost and Latency Belong in the Evaluation Score, Not a Footnote →

Article-grounded definition

Symbol A

the die area.

Read equation 1 in When the Substrate Became the Product →

Article-grounded definition

Symbol A

the economically automatable share of a task family be represented schematically.

Read equation 21 in Humanity Has Always Been a Human–Technology System →

Used in 86 equations

\Delta W = BA, \qquad B \in \mathbb{R}^{d \times r},\ A \in \mathbb{R}^{r \times k},\ r \ll \min(d, k),

Building a Multimodal AI Application That Actually Uses Its Inputs · Equation 1

This equation states an equality: the expressions on both sides have the same value under the article’s assumptions.

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A(t)

Mechanistic Interpretability in 2035: Scenarios and Falsifiers · Equation 1

This mathematical expression combines the displayed quantities; its precise role follows from the surrounding article text.

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A(t)

Mechanistic Interpretability in 2035: Scenarios and Falsifiers · Equation 2

This mathematical expression combines the displayed quantities; its precise role follows from the surrounding article text.

Equation guide → · This term → · Article →

R(t) = \mathbb{1}\!\left[A(t) \ge a^{*}\right] \cdot \mathbb{1}\!\left[S(t) \ge s^{*}\right]

Mechanistic Interpretability in 2035: Scenarios and Falsifiers · Equation 4

This equation states a bound: one expression must stay on the indicated side of the other under the article’s assumptions.

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A(t)

Mechanistic Interpretability in 2035: Scenarios and Falsifiers · Equation 6

This mathematical expression combines the displayed quantities; its precise role follows from the surrounding article text.

Equation guide → · This term → · Article →

A(t)

Mechanistic Interpretability in 2035: Scenarios and Falsifiers · Equation 9

This mathematical expression combines the displayed quantities; its precise role follows from the surrounding article text.

Equation guide → · This term → · Article →

A(t)

Mechanistic Interpretability in 2035: Scenarios and Falsifiers · Equation 13

This mathematical expression combines the displayed quantities; its precise role follows from the surrounding article text.

Equation guide → · This term → · Article →

A

How a Tool Description Becomes an Attack Surface · Equation 1

This mathematical expression combines the displayed quantities; its precise role follows from the surrounding article text.

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\text{exfiltration} \iff A \wedge U \wedge E

How a Tool Description Becomes an Attack Surface · Equation 4

This mathematical expression combines the displayed quantities; its precise role follows from the surrounding article text.

Equation guide → · This term → · Article →

A

Why Cost and Latency Belong in the Evaluation Score, Not a Footnote · Equation 9

at least as good on every axis and strictly better on at least one.

Equation guide → · This term → · Article →

A

Why Cost and Latency Belong in the Evaluation Score, Not a Footnote · Equation 11

at least as good on every axis and strictly better on at least one.

Equation guide → · This term → · Article →

A \succ B \iff s_A \ge s_B,\ \ c_A \le c_B,\ \ l_A \le l_B,\ \ \text{with at least one inequality strict.}

Why Cost and Latency Belong in the Evaluation Score, Not a Footnote · Equation 12

This equation states a bound: one expression must stay on the indicated side of the other under the article’s assumptions.

Equation guide → · This term → · Article →

U_{\lambda}(A) = s_A - \lambda_c\, c_A - \lambda_l\, l_A .

Why Cost and Latency Belong in the Evaluation Score, Not a Footnote · Equation 18

This equation states an equality: the expressions on both sides have the same value under the article’s assumptions.

Equation guide → · This term → · Article →

A

How Verification Actually Works in a Claude Code Workflow · Equation 1

This mathematical expression combines the displayed quantities; its precise role follows from the surrounding article text.

Equation guide → · This term → · Article →

A

Power Density and What It Permits · Equation 3

This mathematical expression combines the displayed quantities; its precise role follows from the surrounding article text.

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P_d = \frac{E}{A\,t} = \frac{C}{A} \times f = C_d\,f

Power Density and What It Permits · Equation 6

This equation states an equality: the expressions on both sides have the same value under the article’s assumptions.

Equation guide → · This term → · Article →

A = A_{\mathrm{direct}} + A_{\mathrm{spacing}} + A_{\mathrm{excluded}}

Power Density and What It Permits · Equation 8

This equation states an equality: the expressions on both sides have the same value under the article’s assumptions.

Equation guide → · This term → · Article →

Y(A) = \left(1 + \frac{D_0 A}{c}\right)^{-c},

When the Substrate Became the Product · Equation 1

This equation states an equality: the expressions on both sides have the same value under the article’s assumptions.

Equation guide → · This term → · Article →

A

When the Substrate Became the Product · Equation 3

the die area.

Equation guide → · This term → · Article →

\frac{\sigma_E}{E} \;=\; \frac{A}{\sqrt{E}} \;\oplus\; B \;\oplus\; C .

What a Particle Detector Actually Measures · Equation 1

This equation states an equality: the expressions on both sides have the same value under the article’s assumptions.

Equation guide → · This term → · Article →

k = A\exp\left(-\frac{E_{\mathrm a}}{RT}\right),

Lowering the Barrier: What a Catalyst Actually Does · Equation 2

This equation states an equality: the expressions on both sides have the same value under the article’s assumptions.

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P_L(d) \;\approx\; A \left( \frac{p}{p_{\mathrm{th}}} \right)^{\left\lfloor (d+1)/2 \right\rfloor} ,

Error Correction Is the Whole Problem in Quantum Computing · Equation 27

This equation gives an approximation: it relates the quantities while allowing an approximation.

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A(\Delta)=I(\Delta)\land P(\Delta)\land V(\Delta)\land H(\Delta),

Engineering Reliable Codex Workflows with Instructions, Tests, Sandboxes, and Human Gates · Equation 1

This equation states an equality: the expressions on both sides have the same value under the article’s assumptions.

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CAC=\frac{ C_{\mathrm{licenses}}+C_{\mathrm{usage}}+C_{\mathrm{runtime}} +C_{\mathrm{human}}+C_{\mathrm{rework}}+C_{\mathrm{incidents}} }{N_{\mathrm{accepted,quality-adjusted}}}.

The Economics of Codex: Tokens, Sandboxes, Review Time, and Software Throughput · Equation 10

This equation states an equality: the expressions on both sides have the same value under the article’s assumptions.

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AC(N)=\frac{F}{N}+c.

The Economics of Codex: Tokens, Sandboxes, Review Time, and Software Throughput · Equation 22

This equation states an equality: the expressions on both sides have the same value under the article’s assumptions.

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A = C \times R \times I \times G,

Humanity Has Always Been a Human–Technology System · Equation 21

This equation states an equality: the expressions on both sides have the same value under the article’s assumptions.

Equation guide → · This term → · Article →

AAA

Meanings in context

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Used in 86 equations

$A$