From 509339009d7ed82f44b59b86ecbddd601444eeed Mon Sep 17 00:00:00 2001
From: tomtuamnuq <76523782+tomtuamnuq@users.noreply.github.com>
Date: Fri, 29 Mar 2024 03:15:00 +0100
Subject: [PATCH] revisit todo comments for issue #1

---
 Cargo.lock        | 1281 ---------------------------------------------
 src/binary_ops.rs |    2 -
 src/matrix.rs     |    9 +-
 src/perplex.rs    |    4 -
 4 files changed, 7 insertions(+), 1289 deletions(-)
 delete mode 100644 Cargo.lock

diff --git a/Cargo.lock b/Cargo.lock
deleted file mode 100644
index 7861d91..0000000
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diff --git a/src/binary_ops.rs b/src/binary_ops.rs
index 49be382..c93d5df 100644
--- a/src/binary_ops.rs
+++ b/src/binary_ops.rs
@@ -105,8 +105,6 @@ impl<T: Copy + NumAssign> DivAssign for Perplex<T> {
     }
 }
 
-// TODO binary ops between references ? use copy semantics
-
 // binary between Perplex and T
 impl<T: Copy + Num> Add<T> for Perplex<T> {
     type Output = Perplex<T>;
diff --git a/src/matrix.rs b/src/matrix.rs
index 094b645..9c96f4a 100644
--- a/src/matrix.rs
+++ b/src/matrix.rs
@@ -5,7 +5,8 @@
 //! ## Overview
 //! The `PerplexMatrixForm` type is a type alias for a 2x2 matrix from the `nalgebra` crate, representing the matrix form of a perplex number. This module includes conversions between the `Perplex` struct and its matrix representation.
 //! The matrix representation of a perplex number is symmetric, with the real part on the diagonal and the hyperbolic part on the off-diagonal. This symmetry reflects the properties of perplex numbers regarding the hyperbolic unit.
-//! Addition, multiplication as well as inversion of perplex numbers correspond to the matrix operations.
+//! Addition, multiplication, as well as inversion of perplex numbers correspond to the matrix operations.
+//!
 //! ## Example
 //! ```rust
 //! use perplex_num::Perplex;
@@ -19,13 +20,17 @@
 
 use super::perplex::Perplex;
 use nalgebra::{Matrix2, RealField};
-pub type PerplexMatrixForm<T> = Matrix2<T>; // TODO symmetric ? limit operations to the ones defined on a wrapping struct ?
+
+/// A type alias for a 2x2 matrix from `nalgebra`, representing a perplex number as a matrix.
+pub type PerplexMatrixForm<T> = Matrix2<T>;
+
 impl<T: Copy + RealField> From<PerplexMatrixForm<T>> for Perplex<T> {
     /// Converts a matrix form to a perplex number, assuming a symmetric matrix.
     fn from(m: PerplexMatrixForm<T>) -> Self {
         Self { t: m.m11, x: m.m12 }
     }
 }
+
 impl<T: Copy + RealField> From<Perplex<T>> for PerplexMatrixForm<T> {
     /// Returns the matrix form of the perplex number.
     fn from(z: Perplex<T>) -> Self {
diff --git a/src/perplex.rs b/src/perplex.rs
index f1e566d..1eaf91a 100644
--- a/src/perplex.rs
+++ b/src/perplex.rs
@@ -208,8 +208,6 @@ impl<T: Copy + Float> Perplex<T> {
         self.ln().map(|z| z / base.ln())
     }
 
-    // TODO cbrt, powf, powc, expf for Perplex ?
-
     /// Computes the square root of `self` if `self` lies in the right sector, or returns `None` if not. Formula is taken from Eq. 2.23 in [New characterizations of the ring of the split-complex numbers and the field C of complex numbers and their comparative analyses](https://doi.org/10.48550/arXiv.2305.04586).
     #[inline]
     pub fn sqrt(self) -> Option<Self> {
@@ -257,8 +255,6 @@ impl<T: Copy + Float> Perplex<T> {
     pub fn tanh(self) -> Option<Self> {
         self.sinh() / self.cosh()
     }
-
-    // TODO asin, acos, atan, asinh, acosh, atanh ?
 }
 
 impl<T: FloatCore> Perplex<T> {