Chore/replace ejml with ojalgo

.github/copilot-instructions.md

@@ -200,7 +200,7 @@ When writing documentation that includes Java or Python code examples:
 - **Style & Formatting**: Java code follows Google style with project overrides from `.config/checkstyle_neqsim.xml` and formatter profiles (`.config/neqsim_formatter.xml`); keep indentation at two spaces and respect existing comment minimalism.
 - **Code Formatting (Spotless) - MANDATORY**: AI-generated Java is NOT auto-formatted. After creating or editing ANY `.java` file, run `./mvnw spotless:apply` (Windows: `mvnw.cmd spotless:apply`) to reformat to the project style, then `git add` the changes before committing. CI runs `./mvnw spotless:check` and FAILS the build on any unformatted file. Do not rely on local pre-commit hooks being installed, and NEVER bypass the gate with `git commit --no-verify`.
 - **Serialization & Copying**: Many equipment classes rely on Java serialization (`ProcessEquipmentBaseClass.copy()`); avoid introducing non-serializable fields or mark them `transient` to preserve cloning. SpotBugs enforces this via the SE_BAD_FIELD rule. When adding fields to any `Serializable` class (equipment, measurement devices, mechanical design, thermo phases), use the correct modifier order: `private transient Type field;` or `private final transient Type field;`. Common non-serializable types that need `transient`: `Function`, `BiConsumer`, `Consumer`, `Thread`, JDBC `Connection`/`Statement`, Apache Commons Math interpolators, and any inner class that doesn't implement `Serializable`. The `ProcessLogic` interface extends `Serializable`.
-- **External Dependencies**: Core math depends on EJML, Commons Math, JAMA, and MTJ; check numerical stability when swapping linear algebra routines, and keep JSON/YAML handling aligned with gson/jackson versions pinned in pom.xml.
+- **External Dependencies**: Core math depends on ojAlgo, Commons Math, JAMA, and MTJ; check numerical stability when swapping linear algebra routines, and keep JSON/YAML handling aligned with gson/jackson versions pinned in pom.xml.
 - **Java 8 Compatibility (MANDATORY)**: See the critical section at the top of this document. All code MUST compile with Java 8. The CI build will FAIL if you use Java 9+ features like `String.repeat()`, `var`, `List.of()`, etc.
 - **Sample Flow**:
 

.github/workflows/publish_to_maven_central.yml

@@ -40,11 +40,6 @@ jobs:
           gpg-private-key: ${{ secrets.GPG_SIGNING_KEY }}
           gpg-passphrase: MAVEN_GPG_PASSPHRASE
           cache: 'maven'
-      # Clean Maven cache for critical dependencies to avoid stale class issues
-      - name: Clean dependency cache for EJML
-        run: |
-          rm -rf ~/.m2/repository/org/ejml
-          echo "Cleaned EJML from Maven cache to ensure fresh download"
       # --- Java 8 artifact ---
       - name: Publish package (Java 8)
         run: ./mvnw -f pomJava8.xml -P release --batch-mode clean deploy -Dmaven.deploy.skip=true -DskipTests -Djacoco.skip=true -Drevision=${{ steps.release_version.outputs.version }} -ntp

pom.xml

@@ -102,9 +102,9 @@
 			<version>3.6.1</version>
 		</dependency>
 		<dependency>
-			<groupId>org.ejml</groupId>
-			<artifactId>ejml-all</artifactId>
-			<version>0.45.1</version>
+			<groupId>org.ojalgo</groupId>
+			<artifactId>ojalgo</artifactId>
+			<version>52.0.0</version>
 		</dependency>
 		<dependency>
 			<groupId>gov.nist.math</groupId>

pomJava8.xml

@@ -105,9 +105,9 @@
 			<version>3.6.1</version>
 		</dependency>
 		<dependency>
-			<groupId>org.ejml</groupId>
-			<artifactId>ejml-all</artifactId>
-			<version>0.41</version> <!-- Last version supporting java 8-->
+			<groupId>org.ojalgo</groupId>
+			<artifactId>ojalgo</artifactId>
+			<version>52.0.0</version>
 		</dependency>
 		<dependency>
 			<groupId>gov.nist.math</groupId>