Z = 1

Probes (xi, eta) ∈ (eps, 1-eps)^2 at the chosen ranks. Returns (errs, n_valid, probes) where: errs : dict[rank] -> rel-err array (one en

FNV-1a 64 over the canonical options blob — mirrors the opthash the SVDSurface cache uses so the critpatch sidecar lives alongside the matching .svd.b

Translate a CoolProp parameters enum to the SuperAncillary's char key. Supports the three caloric saturation properties used by the #2773 paths.

Parse + validate `options_json` against the SVDSBTL schema. Returns the canonical-JSON form (or "{}" when options_json was empty); throws CoolProp::V

Monotone cubic (PCHIP / Fritsch-Carlson) slopes. Each interior slope is constructed so the resulting Hermite cubic is monotone on every segment when

Phase boundary in both coordinate systems, computed from CoolProp. Returns a dict with the p-T saturation curve and the h-s two-phase dome (l

For each Theta, return the index of the check-file row whose T is closest to T_crit_num * (1 - Theta). Rows are picked in T-space (not index-space

Parse `outputversion = '...'` out of the docs plot script so this gate always tracks exactly the release the docs actually download.

Plot chart

From http://rosettacode.org/wiki/Power_set#C.2B.2B

Prints some fluid information on top of the fitting report.

Shared property list for PSmass_INPUTS: s is the input (secondary axis), so the outputs are ρ, T, h, u, w (speed of sound). Mirror of ph_properties w

Saturation pressure as a function of temperature and composition.

Shared property list for PT_INPUTS: T is the input (secondary axis), so outputs are ρ, h, s, u, w (speed of sound).

Functions that can be used with the solver, they miss the reference values!

Given dict[rank] -> err array, return (rank, achieved_max). rank is the smallest tested rank whose max-err meets the budget; if none meet it,

Cheap rebuild of the RST fragment + summary from a cached failures CSV.

Returns the absolute relative Error from either (B-A)/B or (A-B)/A for abs(B)>abs(A) and abs(A)>abs(B), respectively. If PCT

Return (check_stems, exps_hash_ci) for the pinned fastchebpure release. check_stems: the exact set of stems shipped as outputcheck/{stem}_check.j

Resize the parts of this term

Read the preset build knobs out of a validated options document: `grid.NT/NR/rank` and the optional `pmin` lower-pressure override. Missing keys leave

We have to override some of the functions from the AbstractState. * The incompressibles are only mass-based and do not support conversion * from m

Return R^2 where x and y are array-like.

Run the CoolProp test suite (used by ``CoolProp.test()``). Migrated from nose (dead on Python 3.12+) to pytest; requires pytest to be install

Return (results, counts, samples). results[region][prop_key] = DevAcc of (backend - reference) in the table's reported unit. counts[region] =

Round-trip a single (fluid, T, p) point across all three P+X pairs. The reference state is set via PT_INPUTS; rho, h, s, u are read off; then PH/PS/P

Mean ``AbstractState.update()`` + ``keyed_output()`` time per (backend, input pair, property) over N timing calls. Times BOTH ``PT_INPUTS`` (

Returns M (NT × NR) sample matrix indexed by (i=η, j=ξ).

Walk the (xnorm, log_p_norm) ∈ [0,1] × [0,1] grid for one Region, sample HEOS per cell via the spec's update_state / read_property callbacks, and fill

Fill the series via interpolation