diff --git a/addons/web/__manifest__.py b/addons/web/__manifest__.py
index 7e8648b81b6..e13682633a6 100644
--- a/addons/web/__manifest__.py
+++ b/addons/web/__manifest__.py
@@ -161,7 +161,6 @@ This module provides the core of the Odoo Web Client.
             'web/static/src/legacy/js/core/py_utils.js',
             'web/static/src/legacy/js/core/context.js',
             'web/static/src/legacy/js/core/data_comparison_utils.js',
-            'web/static/src/legacy/js/core/math_utils.js',
             'web/static/src/legacy/js/core/misc.js',
             'web/static/src/legacy/js/fields/*',
             'web/static/src/legacy/js/report/utils.js',
diff --git a/addons/web/static/src/core/utils/arrays.js b/addons/web/static/src/core/utils/arrays.js
index 79d1d8a9fed..f44326f3e9d 100644
--- a/addons/web/static/src/core/utils/arrays.js
+++ b/addons/web/static/src/core/utils/arrays.js
@@ -1,5 +1,32 @@
 /** @odoo-module **/
 
+/**
+ * Same values returned as those returned by cartesian function for case n = 0
+ * and n > 1. For n = 1, brackets are put around the unique parameter elements.
+ *
+ * @returns {Array}
+ */
+function _cartesian() {
+    const args = Array.prototype.slice.call(arguments);
+    if (args.length === 0) {
+        return [undefined];
+    }
+    const firstArray = args[0].map(function (elem) {
+        return [elem];
+    });
+    if (args.length === 1) {
+        return firstArray;
+    }
+    const productOfOtherArrays = _cartesian.apply(null, args.slice(1));
+    return firstArray.reduce(function (acc, elem) {
+        return acc.concat(
+            productOfOtherArrays.map(function (tuple) {
+                return elem.concat(tuple);
+            })
+        );
+    }, []);
+}
+
 /**
  * Helper function returning an extraction handler to use on array elements to
  * return a certain attribute or mutated form of the element.
@@ -92,3 +119,38 @@ export function symmetricalDifference(arrayA, arrayB) {
         .filter((id) => !arrayB.includes(id))
         .concat(arrayB.filter((id) => !arrayA.includes(id)));
 }
+
+/**
+ * Returns the product of any number n of arrays.
+ * The internal structures of their elements is preserved.
+ * For n = 1, no brackets are put around the unique parameter elements
+ * For n = 0, [undefined] is returned since it is the unit
+ * of the cartesian product (up to isomorphism).
+ *
+ * @returns {Array}
+ */
+export function cartesian() {
+    const args = Array.prototype.slice.call(arguments);
+    if (args.length === 0) {
+        return [undefined];
+    } else if (args.length === 1) {
+        return args[0];
+    } else {
+        return _cartesian.apply(null, args);
+    }
+}
+
+/**
+ * Returns all initial sections of a given array, e.g. for [1, 2] the array
+ * [[], [1], [1, 2]] is returned.
+ *
+ * @param {Array} array
+ * @returns {Array[]}
+ */
+export function sections(array) {
+    const sections = [];
+    for (let i = 0; i < array.length + 1; i++) {
+        sections.push(array.slice(0, i));
+    }
+    return sections;
+}
diff --git a/addons/web/static/src/legacy/js/core/math_utils.js b/addons/web/static/src/legacy/js/core/math_utils.js
deleted file mode 100644
index 6f560624ffc..00000000000
--- a/addons/web/static/src/legacy/js/core/math_utils.js
+++ /dev/null
@@ -1,73 +0,0 @@
-odoo.define('web.mathUtils', function () {
-"use strict";
-
-/**
- * Same values returned as those returned by cartesian function for case n = 0
- * and n > 1. For n = 1, brackets are put around the unique parameter elements.
- *
- * @returns {Array}
- */
-function _cartesian() {
-    var args = Array.prototype.slice.call(arguments);
-    if (args.length === 0) {
-        return [undefined];
-    }
-    var firstArray = args[0].map(function (elem) {
-        return [elem];
-    });
-    if (args.length === 1) {
-        return firstArray;
-    }
-    var productOfOtherArrays = _cartesian.apply(null, args.slice(1));
-    var result = firstArray.reduce(
-        function (acc, elem) {
-            return acc.concat(productOfOtherArrays.map(function (tuple) {
-                return elem.concat(tuple);
-            }));
-        },
-        []
-    );
-    return result;
-}
-
-/**
- * Returns the product of any number n of arrays.
- * The internal structures of their elements is preserved.
- * For n = 1, no brackets are put around the unique parameter elements
- * For n = 0, [undefined] is returned since it is the unit
- * of the cartesian product (up to isomorphism).
- *
- * @returns {Array}
- */
-function cartesian() {
-    var args = Array.prototype.slice.call(arguments);
-    if (args.length === 0) {
-        return [undefined];
-    } else if (args.length === 1) {
-        return args[0];
-    } else {
-        return _cartesian.apply(null, args);
-    }
-}
-
-/**
- * Returns all initial sections of a given array, e.g. for [1, 2] the array
- * [[], [1], [1, 2]] is returned.
- *
- * @param {Array} array
- * @returns {Array[]}
- */
-function sections(array) {
-    var sections = [];
-    for (var i = 0; i < array.length + 1; i++) {
-        sections.push(array.slice(0, i));
-    }
-    return sections;
-}
-
-return {
-    cartesian: cartesian,
-    sections: sections,
-};
-
-});
diff --git a/addons/web/static/src/legacy/js/views/pivot/pivot_model.js b/addons/web/static/src/legacy/js/views/pivot/pivot_model.js
index ab5e4de309e..c7c174cda28 100644
--- a/addons/web/static/src/legacy/js/views/pivot/pivot_model.js
+++ b/addons/web/static/src/legacy/js/views/pivot/pivot_model.js
@@ -275,7 +275,7 @@ import concurrency from 'web.concurrency';
 import core from 'web.core';
 import dataComparisonUtils from 'web.dataComparisonUtils';
 import Domain from 'web.Domain';
-import mathUtils from 'web.mathUtils';
+import * as mathUtils from '@web/core/utils/arrays';
 import session from 'web.session';
 
 
diff --git a/addons/web/static/tests/core/utils/arrays_tests.js b/addons/web/static/tests/core/utils/arrays_tests.js
index 85e7dee61da..6a5fd1f12a0 100644
--- a/addons/web/static/tests/core/utils/arrays_tests.js
+++ b/addons/web/static/tests/core/utils/arrays_tests.js
@@ -1,6 +1,6 @@
 /** @odoo-module **/
 
-import { groupBy, sortBy } from "@web/core/utils/arrays";
+import { cartesian, groupBy, sortBy } from "@web/core/utils/arrays";
 
 QUnit.module("utils", () => {
     QUnit.module("Arrays");
@@ -152,4 +152,72 @@ QUnit.module("utils", () => {
             { x: "a" },
         ]);
     });
+
+    QUnit.test("cartesian product of zero arrays", function (assert) {
+        assert.deepEqual(cartesian(), [undefined], "the unit of the product is a singleton");
+    });
+
+    QUnit.test("cartesian product of a single array", function (assert) {
+        assert.deepEqual(cartesian([]), []);
+        assert.deepEqual(cartesian([1]), [1], "we don't want unecessary brackets");
+        assert.deepEqual(cartesian([1, 2]), [1, 2]);
+        assert.deepEqual(
+            cartesian([[1, 2]]),
+            [[1, 2]],
+            "the internal structure of elements should be preserved"
+        );
+        assert.deepEqual(
+            cartesian([
+                [1, 2],
+                [3, [2]],
+            ]),
+            [
+                [1, 2],
+                [3, [2]],
+            ],
+            "the internal structure of elements should be preserved"
+        );
+    });
+
+    QUnit.test("cartesian product of two arrays", function (assert) {
+        assert.deepEqual(cartesian([], []), []);
+        assert.deepEqual(cartesian([1], []), []);
+        assert.deepEqual(cartesian([1], [2]), [[1, 2]]);
+        assert.deepEqual(cartesian([1, 2], [3]), [
+            [1, 3],
+            [2, 3],
+        ]);
+        assert.deepEqual(
+            cartesian([[1], 4], [2, [3]]),
+            [
+                [[1], 2],
+                [[1], [3]],
+                [4, 2],
+                [4, [3]],
+            ],
+            "the internal structure of elements should be preserved"
+        );
+    });
+
+    QUnit.test("cartesian product of three arrays", function (assert) {
+        assert.deepEqual(cartesian([], [], []), []);
+        assert.deepEqual(cartesian([1], [], [2, 5]), []);
+        assert.deepEqual(
+            cartesian([1], [2], [3]),
+            [[1, 2, 3]],
+            "we should have no unecessary brackets, we want elements to be 'triples'"
+        );
+        assert.deepEqual(
+            cartesian([[1], 2], [3], [4]),
+            [
+                [[1], 3, 4],
+                [2, 3, 4],
+            ],
+            "the internal structure of elements should be preserved"
+        );
+    });
+
+    QUnit.test("cartesian product of four arrays", function (assert) {
+        assert.deepEqual(cartesian([1], [2], [3], [4]), [[1, 2, 3, 4]]);
+    });
 });
diff --git a/addons/web/static/tests/legacy/core/math_utils_tests.js b/addons/web/static/tests/legacy/core/math_utils_tests.js
deleted file mode 100644
index 1029bdd062d..00000000000
--- a/addons/web/static/tests/legacy/core/math_utils_tests.js
+++ /dev/null
@@ -1,56 +0,0 @@
-odoo.define('web.math_utils_tests', function(require) {
-"use strict";
-
-var mathUtils = require('web.mathUtils');
-var cartesian = mathUtils.cartesian;
-
-QUnit.module('mathUtils', function () {
-
-    QUnit.module('cartesian');
-
-
-    QUnit.test('cartesian product of zero arrays', function(assert) {
-        assert.expect(1);
-        assert.deepEqual(cartesian(), [undefined],
-            "the unit of the product is a singleton");
-    });
-
-    QUnit.test('cartesian product of a single array', function(assert) {
-        assert.expect(5);
-        assert.deepEqual(cartesian([]), []);
-        assert.deepEqual(cartesian([1]), [1],
-            "we don't want unecessary brackets");
-        assert.deepEqual(cartesian([1, 2]), [1, 2]);
-        assert.deepEqual(cartesian([[1, 2]]), [[1, 2]],
-            "the internal structure of elements should be preserved");
-        assert.deepEqual(cartesian([[1, 2], [3, [2]]]), [[1, 2], [3, [2]]],
-            "the internal structure of elements should be preserved");
-    });
-
-    QUnit.test('cartesian product of two arrays', function(assert) {
-        assert.expect(5);
-        assert.deepEqual(cartesian([], []), []);
-        assert.deepEqual(cartesian([1], []), []);
-        assert.deepEqual(cartesian([1], [2]), [[1, 2]]);
-        assert.deepEqual(cartesian([1, 2], [3]), [[1, 3], [2, 3]]);
-        assert.deepEqual(cartesian([[1], 4], [2, [3]]), [[[1], 2], [[1], [3]], [4, 2], [4, [3]] ],
-            "the internal structure of elements should be preserved");
-    });
-
-    QUnit.test('cartesian product of three arrays', function(assert) {
-        assert.expect(4);
-        assert.deepEqual(cartesian([], [], []), []);
-        assert.deepEqual(cartesian([1], [], [2, 5]), []);
-        assert.deepEqual(cartesian([1], [2], [3]), [[1, 2, 3]],
-            "we should have no unecessary brackets, we want elements to be 'triples'");
-        assert.deepEqual(cartesian([[1], 2], [3], [4]), [[[1], 3, 4], [2, 3, 4]],
-            "the internal structure of elements should be preserved");
-    });
-
-    QUnit.test('cartesian product of four arrays', function(assert) {
-        assert.expect(1);
-        assert.deepEqual(cartesian([1], [2], [3], [4]), [[1, 2, 3, 4]]);
-    });
-
-});
-});