Live mathematical reference

Symbols and notation

Symbols can mean different things in different articles. Definitions below are shown only when an equation guide or its article provides one; otherwise the entry identifies where to read the equation in context.

1506 symbols.

ρR\rho_R

\rho_R

3 equations

Symbol rho_R: the chosen fiducial state.

ρs\rho_s

\rho_s

2 equations

No site-wide meaning is inferred for this symbol.

ρS\rho_S

\rho_S

2 equations

Symbol rho_S: what an observer restricted to the system alone can predict with.

ρt\rho_t

\rho_t

13 equations

Symbol rho_t: effective transmission fidelity.

ρ0,Hu\rho^{u}_{0,H}

\rho^{u}_{0,H}

2 equations

No site-wide meaning is inferred for this symbol.

ρ1,Hu\rho^{u}_{1,H}

\rho^{u}_{1,H}

2 equations

No site-wide meaning is inferred for this symbol.

σ\sigma

\sigma

43 equations

Symbol σ: the search tool’s own fixed overhead.

Σ\Sigma

\Sigma

5 equations

No site-wide meaning is inferred for this symbol.

σCD2\sigma_{\mathrm{CD}}^{2}

\sigma_{\mathrm{CD}}^{2}

1 equation

No site-wide meaning is inferred for this symbol.

σmax⁡\sigma_{\max}

\sigma_{\max}

3 equations

Symbol sigma_max: peak mechanical stress at any bonded interface.

σdose\sigma_{\text{dose}}

\sigma_{dose}

1 equation

No site-wide meaning is inferred for this symbol.

σ∞\sigma_\infty

\sigma_\infty

2 equations

No site-wide meaning is inferred for this symbol.

Στ\Sigma_\tau

\Sigma_\tau

2 equations

No site-wide meaning is inferred for this symbol.

σ0\sigma_0

\sigma_0

2 equations

Symbol sigma_0: the scale parameter.

σ8\sigma_8

\sigma_8

2 equations

No site-wide meaning is inferred for this symbol.

σE\sigma_E

\sigma_E

1 equation

No site-wide meaning is inferred for this symbol.

σf\sigma_f

\sigma_f

1 equation

Symbol sigma_f: the critical remote stress.

σN\sigma_N

\sigma_N

1 equation

No site-wide meaning is inferred for this symbol.

σp\sigma_p

\sigma_p

1 equation

No site-wide meaning is inferred for this symbol.

σr2\sigma_r^2

\sigma_r^2

1 equation

No site-wide meaning is inferred for this symbol.

σy\sigma_y

\sigma_y

5 equations

No site-wide meaning is inferred for this symbol.

σY\sigma_Y

\sigma_Y

5 equations

Symbol sigma_Y: the outcome’s population standard deviation.

σ(n)\sigma^{(n)}

\sigma^{(n)}

2 equations

No site-wide meaning is inferred for this symbol.

σ2\sigma^2

\sigma^2

1 equation

No site-wide meaning is inferred for this symbol.

τ\tau

\tau

92 equations

Symbol τ: the doubling time implied by the data.

τβ−\tau_{\beta^-}

\tau_{\beta^-}

3 equations

Symbol tau_β^-: that nucleus’s beta-decay half-life.

τaudio\tau_{\mathrm{audio}}

\tau_{\mathrm{audio}}

2 equations

Symbol tau_audio: the per-frame and per-second-of-audio token costs Google publishes.

τframe\tau_{\mathrm{frame}}

\tau_{\mathrm{frame}}

2 equations

No site-wide meaning is inferred for this symbol.