Code and paper notations

The package’s identifiers follow the notation of Chiang+(2026d). A quantity with a symbol in Chiang+(2026d) or in the Technical notes is called <family>_<symbol>. The family prefix gives the kind of quantity, and the rest of the name is the symbol or the symbol’s subscript in lower case. A truncated quantity (hatted in Chiang+(2026d)) takes the suffix _trunc, as in p_trunc, df_trunc, rho_trunc and mass_trunc. The untruncated quantity keeps the name without the suffix. Every docstring gives the symbol beside the name the first time the docstring describes the quantity.

Family	Prefix	Names	Paper
density and its parameters	rho_	rho, rho_aux, rho_alpha, rho_beta, rho_gamma, rho_norm	\(\varrho\), \(\varrho_{\rm aux}\), \((\alpha, \beta, \gamma)\), \(C\)
anisotropy	beta_	beta_c, beta_sigma	\(\beta_{\rm c}\), \(\beta_\sigma\)
radii	r_	r, r_a, r_t, r_2d, r_off, r_ape	\(R\), \(R_{\rm a}\), \(R_{\rm t}\), \(R_{\rm 2D}\), \(R_{\rm off}\), \(R_{\rm ape}\)
relative potential	p_	p, p_0	\(P\), \(P_0\)
energy-like variables	k_, q_	k, k_t, q, q_min, q_0	\(\mathcal{K}\), \(\mathcal{K}_{\rm t}\), \(\mathcal{Q}\), \(\mathcal{Q}_{\rm min}\), \(\mathcal{Q}_0\)
distribution function	df_	df, df_k	\(F\), \(F_\mathcal{K}\)
mass	mass_	mass, mass_t, mass_0	\(\mathcal{M}\), \(M_{\rm t}\), \(M_0\)
order of the inversion	order_	order_m, order_n	\((m, n)\)
velocities and dispersions	v_, sigma_	v_r, v_t, v_los, v_esc, sigma_r, sigma_t, sigma_los	\(V_{\rm r}\), \(V_{\rm t}\), \(V_{\rm los}\), \(V_{\rm esc}\), \(\sigma_{\rm r}\), \(\sigma_{\rm t}\), \(\sigma_{\rm los}\)
probability densities	pdf_	pdf_v	\(p(V \,|\, R)\)

Where the letter of Chiang+(2026d) cannot serve as a name, a fixed word replaces the letter. The normalization \(C\) of the density is rho_norm, since rho_c would read as a central density. The concentration \(c\) is concentration. The letter c alone is never a name. As a subscript, c means central (beta_c).

Derived names

What	Form	Example
logarithm of a quantity	ln_, log10_ prefix	ln_r, log10_df
derivative	d<y>_d<x>, the order as a digit	drho_dp, d2rho_dp2
count	n_ prefix	n_nodes, n_rows
index	i_ prefix	i_first, i_last
quadrature nodes and weights	_nodes, _weights suffix	k_nodes, k_weights
tabulated values on a grid	_grid suffix	r_grid, df_grid
boolean	is_, has_ prefix	is_physical, has_edge

The three unit systems are internal, model and physical (Units).