release/0.14.0 (#100)

* drop affine trait
* add subshell_of
* extend chemistry test suite
* add integral test suite
* add curve test suite
* add exponential test suite
* add projection test suite
* add quaternion test suite
* assert blades
* composed octonion
* add detail
* revise line ranges
* release/0.14.0

Author: mxfactorial

.agents/onboard.md

@@ -61,11 +61,11 @@ learn how angle impls PartialEq and Eq in src/angle.rs:635~653
 
 learn how angle overloads arithmetic operators in src/angle.rs:655~844
 
-learn how to construct geonum with new, new_with_angle from src/geonum_mod.rs:32~49
+learn how to construct geonum with new, new_with_angle from src/geonum_mod.rs:23~49
 
 learn how geonum overloads arithmetic operators in src/geonum_mod.rs:778~1044
 
-learn how geonum can express any number type from the its_a_scalar:8-36, its_a_vector:39-72, its_a_real_number:75-108, its_an_imaginary_number:111-139, its_a_complex_number:142-174, its_a_dual_number:177-295, its_an_octonion:298-341 tests in tests/numbers_test.rs
+learn how geonum can express any number type from the its_a_scalar:8-36, its_a_vector:39-72, its_a_real_number:75-108, its_an_imaginary_number:111-139, its_a_complex_number:142-174, its_a_dual_number:177-295, its_an_octonion:298-318 tests in tests/numbers_test.rs
 
 learn how geonum eliminates angle slack created by decomposing angles into scalar coefficients by reading the it_proves_decomposing_angles_with_linearly_combined_basis_vectors_loses_angle_addition:13-84, it_proves_decomposition_distributes_one_angle_across_multiple_scalars:87-160, it_proves_quaternion_tables_add_back_what_decomposition_subtracts:519-660, it_proves_anticommutativity_exists_because_decomposition_subtracts_different_amounts:663-726 tests in tests/linear_algebra_test.rs
 

CHANGELOG.md

@@ -1,5 +1,18 @@
 # changelog
 
+## 0.14.0 (2026-06-14)
+
+### removed
+- `affine` trait and feature — translate was `+`, shear was `rotate`; the layer only re-vocabularied the core
+
+### fixed
+- chemistry `electron_affinity` signs by subshell continuity (was a grade proxy), matching NIST except nitrogen
+- `it_computes_ijk_product`, `its_an_octonion`: assert the primitive product's commutativity/associativity (`i·j = k`, `ijk = −1`) instead of bailing on the non-commutativity/non-associativity the decomposition table adds back (linear_algebra_test)
+
+### added
+- projection_test, curve_test, integral_test, exponential_test: line, area, and the integral as angle-first ops; `wave_sum` interference coverage in geocollection_test
+- quaternion_test: the quaternion product factored — commutative rotor (`*`) and anti-symmetric wedge (`a∧b = −b∧a`), `ijk = −1` in blade arithmetic, rotation composition order-dependent by exactly the geometric angle; plus a guard test that `e3∧e1 = 0` is a dropped-blade shadow, not a broken cycle
+
 ## 0.13.0 (2026-05-24)
 
 ### breaking

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "geonum"
-version = "0.13.0"
+version = "0.14.0"
 edition = "2021"
 repository = "https://github.com/mxfactorial/geonum"
 description = "geometric number library supporting unlimited dimensions with O(1) complexity"
@@ -17,9 +17,8 @@ projection = []
 ml = []
 em = []
 waves = []
-affine = []
 chemistry = []
-all = ["optics", "projection", "ml", "em", "waves", "affine", "chemistry"]
+all = ["optics", "projection", "ml", "em", "waves", "chemistry"]
 
 [dependencies]
 

Cargo.toml

@@ -151,14 +151,18 @@ cga_test.rs
 chem_constants_test.rs
 chemistry_test.rs
 computer_vision_test.rs
+curve_test.rs
 dimension_test.rs
 economics_test.rs
 einstein_test.rs
 em_field_theory_test.rs
+exponential_test.rs
 fem_test.rs
 finance_test.rs
+geocollection_test.rs
 grade_test.rs
 gravitational_wave_test.rs
+integral_test.rs
 linear_algebra_test.rs
 machine_learning_test.rs
 mechanics_test.rs
@@ -171,8 +175,10 @@ numbers_test.rs
 optics_test.rs
 optimization_test.rs
 pga_test.rs
+projection_test.rs
 pseudoscalar_test.rs
 qm_test.rs
+quaternion_test.rs
 rendering_test.rs
 robotics_test.rs
 schwarzschild_test.rs
@@ -396,11 +402,11 @@ geometric numbers build dimensions by rotating—not stacking
       - its_an_imaginary_number:111-139
       - its_a_complex_number:142-174
       - its_a_dual_number:177-295
-      - its_an_octonion:298-341
-      - its_a_matrix:344-398
-      - its_a_tensor:401-595
-      - it_dualizes_log2_geometric_algebra_components:647-680
-      - its_a_clifford_number:940-1020
+      - its_an_octonion:298-318
+      - its_a_matrix:321-375
+      - its_a_tensor:378-572
+      - it_dualizes_log2_geometric_algebra_components:624-657
+      - its_a_clifford_number:917-997
 
     - tests/pseudoscalar_test.rs
       - it_solves_the_exponential_complexity_explosion:18-79

README.md

@@ -75,6 +75,21 @@ fn last_filled(z: usize) -> usize {
     n
 }
 
+/// which (n, l) subshell the z-th electron lands in, by the madelung walk.
+/// the affinity sign turns on whether the added electron continues a subshell
+/// or opens a new one — `subshell_of(z + 1) == subshell_of(z)`
+fn subshell_of(z: usize) -> (usize, usize) {
+    let mut placed = 0;
+    for (n, l) in Geonum::madelung_order(6) {
+        let cap = 2 * (2 * l + 1);
+        if placed + cap >= z {
+            return (n, l);
+        }
+        placed += cap;
+    }
+    (0, 0)
+}
+
 /// the unsigned binding of the (z+1)th electron stepping on — a screened (+1)
 /// nucleus, projected over the anion's valence shell. shared by `electron_affinity`
 /// (signed) and `electronegativity`
@@ -118,8 +133,8 @@ pub trait Chemistry: Sized {
     fn ionization_energy(z: usize, electrons: usize, lattice: Lattice) -> f64;
 
     /// signed electron affinity in eV: the next electron stepping on. bound
-    /// (positive) for open shells, repulsive (negative) where it would open a new
-    /// shell — a closed-shell marginal lands at grade 2 and the sign flips
+    /// (positive) when it extends the open subshell, repulsive (negative) when it
+    /// opens a fresh closure — the sign is `subshell_of(z + 1) == subshell_of(z)`
     fn electron_affinity(z: usize, lattice: Lattice) -> f64;
 
     /// Mulliken electronegativity, (IE1 + EA binding)/2
@@ -226,12 +241,15 @@ impl Chemistry for Geonum {
     }
 
     fn electron_affinity(z: usize, lattice: Lattice) -> f64 {
-        let marginal = Geonum::electron_wave(z + 1, lattice) - Geonum::electron_wave(z, lattice);
         let bind = affinity_binding(z, lattice);
-        if marginal.angle.grade() == 2 {
-            -bind // a closed shell refuses the electron — repulsive
-        } else {
+        // bound iff the added (z+1)th electron extends the open subshell; unbound
+        // iff it is the first occupant of a fresh closure that repels it. grade
+        // cannot sign this — the alkali spin-pair (bound) and the noble shell
+        // jump (unbound) both land grade 2 — but subshell continuity can
+        if subshell_of(z + 1) == subshell_of(z) {
             bind
+        } else {
+            -bind
         }
     }
 

src/traits/affine.rs

@@ -29,11 +29,6 @@ pub mod waves;
 #[cfg(feature = "waves")]
 pub use waves::Waves;
 
-#[cfg(feature = "affine")]
-pub mod affine;
-#[cfg(feature = "affine")]
-pub use affine::Affine;
-
 #[cfg(feature = "chemistry")]
 pub mod chemistry;
 #[cfg(feature = "chemistry")]