a few minutes ago [1] i was latexing and realised that i needed another name for a function .. yet i had already used

i can't just call it

[runs through alphabet]

[sighs]

i guess i'll use

it feels the least strange, to me.

the greek letter

odd, how some conventions become crippling. to me, for instance,

[1] ..

[2]

**f**,**g**, and**h**..*argh ..*i can't just call it

**f'**("f prime") either, because i already used (prime) for differentiation of functions on the real line .. and**f**just looks .. weird:_{0}*i mean, what's the subscript for*?[runs through alphabet]

[sighs]

i guess i'll use

**u**;it feels the least strange, to me.

the greek letter

**φ**is close to**f**, but it looks too much like a smooth, compactly-supported function for my taste ..odd, how some conventions become crippling. to me, for instance,

**a**and**b**are points or parameters (*or very rarely, indices*)**c**is a constant,**d**is the exterior differential,**e**is base e (*and occasionally an embedding**)**f**,**g**, and**h**are functions,**i**,**j**,**k**are indices (*with*[2])**i**sometimes the inclusion map**l**denotes a line,**m**and**n**are natural numbers,**o**is a base point in a space***p**and**q**are either points, exponents, or polynomials,**r**is the radius of a ball (*occasionally a third polynomial*),**s**and**t**are parametrisation variables,**u**and**v**are vectorfields,**w**is a weight function***x**,**y**, and**z**are spatial variables.

**A**is a matrix, sometimes a constant,**B**is a ball,**C**is a constant, subject to change, line by line,**D**is the total derivative map,**E**is the base space for a fibre bundle,**F**and**G**are mappings between spaces,**H**is used for homology,**I**is the identity map,**J**is used for jacobians,**K**is a distorsion function for quasiconformal mappings***L**is a linear operator, or a space of integrable functions,**M**and**N**denote sobolev spaces of functions* (on metric spaces)**O**is an open set,**P**is .. an affine hyperplane? (*i rarely use this: huh .*.)**Q**is a cube,**R**is the larger of two radii,**S**is a symmetric tensor,**T**is a linear operator between normed linear spaces,**U**is a unitary operator,**V**and**W**are vector spaces,**X**,**Y**, and**Z**are spaces.

**α**and**β**are multi-indices,**γ**is a curve,**δ**and**ε**are small numbers,**ζ**is an embedding [2]**η**is a standard, smooth mollifier,**θ**is an angle,**ι**is the inclusion map,**κ**denotes curvature,**λ**is an eigenvalue,**μ**and**ν**are measures,**ξ**are coordinates on a differentiable structure* (or a phase space variable)**ο**looks too much like an o, so it's still a base point,**π**is either a projection map or a homotopy group,**ρ**is the density function to an absolutely continuous measure,**σ**is surface area measure,**τ**is a dummy variable for integration,**υ**, i never use, though**Υ**is used for jets* (*a la viscosity solutions for PDE*)**φ**and**ψ**are test functions,**χ**is a characteristic (indicator) function,**ω**is a solid angle.

[1] ..

*and yes, clearly i'm blogging now*.**q-:**[2]

*i don't do complex analysis unless absolutely necessary*.
## 1 comment:

You could use capital greek letters such as Gamma, Delta, Sigma, Pi, Lambda, and Omega. Wait, can't use those either. About the only thing left is the Batman symbol.

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