diff --git a/lib/node_modules/@stdlib/lapack/base/disnan/README.md b/lib/node_modules/@stdlib/lapack/base/disnan/README.md
new file mode 100644
index 000000000000..3418c3f4340a
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/disnan/README.md
@@ -0,0 +1,174 @@
+<!--
+
+@license Apache-2.0
+
+Copyright (c) 2026 The Stdlib Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+-->
+
+# disnan
+
+> LAPACK auxiliary routine to test whether a double-precision floating-point number is `NaN`.
+
+<section class="usage">
+
+## Usage
+
+```javascript
+var disnan = require( '@stdlib/lapack/base/disnan' );
+```
+
+#### disnan( x )
+
+Tests whether a double-precision floating-point number is `NaN`.
+
+```javascript
+var bool = disnan( NaN );
+// returns true
+
+bool = disnan( 5.0 );
+// returns false
+```
+
+The function has the following parameters:
+
+-   **x**: input value.
+
+</section>
+
+<!-- /.usage -->
+
+<section class="notes">
+
+## Notes
+
+-   `disnan()` corresponds to the [LAPACK][lapack] auxiliary routine [`disnan`][lapack-disnan].
+
+</section>
+
+<!-- /.notes -->
+
+<section class="examples">
+
+## Examples
+
+<!-- eslint no-undef: "error" -->
+
+```javascript
+var discreteUniform = require( '@stdlib/random/array/discrete-uniform' );
+var logEachMap = require( '@stdlib/console/log-each-map' );
+var disnan = require( '@stdlib/lapack/base/disnan' );
+
+var opts = {
+    'dtype': 'float64'
+};
+var x = discreteUniform( 100, -50, 50, opts );
+
+logEachMap( 'disnan( %d ) = %s', x, disnan );
+```
+
+</section>
+
+<!-- /.examples -->
+
+<!-- C interface documentation. -->
+
+* * *
+
+<section class="c">
+
+## C APIs
+
+<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->
+
+<section class="intro">
+
+</section>
+
+<!-- /.intro -->
+
+<!-- C usage documentation. -->
+
+<section class="usage">
+
+### Usage
+
+```c
+TODO
+```
+
+#### TODO
+
+TODO.
+
+```c
+TODO
+```
+
+TODO
+
+```c
+TODO
+```
+
+</section>
+
+<!-- /.usage -->
+
+<!-- C API usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="notes">
+
+</section>
+
+<!-- /.notes -->
+
+<!-- C API usage examples. -->
+
+<section class="examples">
+
+### Examples
+
+```c
+TODO
+```
+
+</section>
+
+<!-- /.examples -->
+
+</section>
+
+<!-- /.c -->
+
+<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->
+
+<section class="related">
+
+</section>
+
+<!-- /.related -->
+
+<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="links">
+
+[lapack]: https://www.netlib.org/lapack/explore-html/
+
+[lapack-disnan]: https://www.netlib.org/lapack/explore-html/d0/d4c/group__isnan_ga7aa3164d5df8d883754b0a70e9c7209c.html
+
+</section>
+
+<!-- /.links -->
diff --git a/lib/node_modules/@stdlib/lapack/base/disnan/benchmark/benchmark.js b/lib/node_modules/@stdlib/lapack/base/disnan/benchmark/benchmark.js
new file mode 100644
index 000000000000..47ef7ef1e1b0
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/disnan/benchmark/benchmark.js
@@ -0,0 +1,54 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var bench = require( '@stdlib/bench' );
+var uniform = require( '@stdlib/random/array/uniform' );
+var isBoolean = require( '@stdlib/assert/is-boolean' ).isPrimitive;
+var pkg = require( './../package.json' ).name;
+var disnan = require( './../lib' );
+
+
+// MAIN //
+
+bench( pkg, function benchmark( b ) {
+	var len;
+	var x;
+	var z;
+	var i;
+
+	len = 100;
+	x = uniform( len, -50, 50 );
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		z = disnan( x[ i % len ] );
+		if ( typeof z !== 'boolean' ) {
+			b.fail( 'should return a boolean' );
+		}
+	}
+	b.toc();
+	if ( !isBoolean( z ) ) {
+		b.fail( 'should return a boolean' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});
diff --git a/lib/node_modules/@stdlib/lapack/base/disnan/docs/repl.txt b/lib/node_modules/@stdlib/lapack/base/disnan/docs/repl.txt
new file mode 100644
index 000000000000..517e6eeb807b
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/disnan/docs/repl.txt
@@ -0,0 +1,24 @@
+
+{{alias}}( x )
+    Tests whether a double-precision floating-point number is NaN.
+
+    Parameters
+    ----------
+    x: number
+        Input value.
+
+    Returns
+    -------
+    bool: boolean
+        Boolean indicating whether an input value is NaN.
+
+    Examples
+    --------
+    > var bool = {{alias}}( NaN )
+    true
+    > bool = {{alias}}( 5.0 )
+    false
+
+    See Also
+    --------
+
diff --git a/lib/node_modules/@stdlib/lapack/base/disnan/docs/types/index.d.ts b/lib/node_modules/@stdlib/lapack/base/disnan/docs/types/index.d.ts
new file mode 100644
index 000000000000..95e375a267de
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/disnan/docs/types/index.d.ts
@@ -0,0 +1,40 @@
+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+// TypeScript Version: 4.1
+
+/**
+* Tests whether a double-precision floating-point number is NaN.
+*
+* @param x - input value
+* @returns boolean indicating whether an input value is NaN
+*
+* @example
+* var bool = disnan( NaN );
+* // returns true
+*
+* @example
+* var bool = disnan( 5.0 );
+* // returns false
+*/
+declare function disnan( x: number ): boolean;
+
+
+// EXPORTS //
+
+export = disnan;
diff --git a/lib/node_modules/@stdlib/lapack/base/disnan/docs/types/test.ts b/lib/node_modules/@stdlib/lapack/base/disnan/docs/types/test.ts
new file mode 100644
index 000000000000..b655b56ae275
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/disnan/docs/types/test.ts
@@ -0,0 +1,42 @@
+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+import disnan = require( './index' );
+
+
+// TESTS //
+
+// The function returns a boolean...
+{
+	disnan( 8 ); // $ExpectType boolean
+}
+
+// The compiler throws an error if the function is provided a value other than a number...
+{
+	disnan( true ); // $ExpectError
+	disnan( false ); // $ExpectError
+	disnan( '5' ); // $ExpectError
+	disnan( [] ); // $ExpectError
+	disnan( {} ); // $ExpectError
+	disnan( ( x: number ): number => x ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided insufficient arguments...
+{
+	disnan(); // $ExpectError
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/disnan/examples/index.js b/lib/node_modules/@stdlib/lapack/base/disnan/examples/index.js
new file mode 100644
index 000000000000..6418760af007
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/disnan/examples/index.js
@@ -0,0 +1,30 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+var discreteUniform = require( '@stdlib/random/array/discrete-uniform' );
+var logEachMap = require( '@stdlib/console/log-each-map' );
+var disnan = require( './../lib' );
+
+var opts = {
+	'dtype': 'float64'
+};
+var x = discreteUniform( 100, -50, 50, opts );
+
+logEachMap( 'disnan( %d ) = %s', x, disnan );
diff --git a/lib/node_modules/@stdlib/lapack/base/disnan/lib/index.js b/lib/node_modules/@stdlib/lapack/base/disnan/lib/index.js
new file mode 100644
index 000000000000..5db1232da25c
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/disnan/lib/index.js
@@ -0,0 +1,43 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+/**
+* LAPACK auxiliary routine to test whether a double-precision floating-point number is NaN.
+*
+* @module @stdlib/lapack/base/disnan
+*
+* @example
+* var disnan = require( '@stdlib/lapack/base/disnan' );
+*
+* var bool = disnan( NaN );
+* // returns true
+*
+* bool = disnan( 5.0 );
+* // returns false
+*/
+
+// MODULES //
+
+var main = require( './main.js' );
+
+
+// EXPORTS //
+
+module.exports = main;
diff --git a/lib/node_modules/@stdlib/lapack/base/disnan/lib/main.js b/lib/node_modules/@stdlib/lapack/base/disnan/lib/main.js
new file mode 100644
index 000000000000..85f30a2f1781
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/disnan/lib/main.js
@@ -0,0 +1,49 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var dlaisnan = require( '@stdlib/lapack/base/dlaisnan' );
+
+
+// MAIN //
+
+/**
+* Tests whether a double-precision floating-point number is NaN.
+*
+* @param {number} x - input value
+* @returns {boolean} boolean indicating whether an input value is NaN
+*
+* @example
+* var bool = disnan( NaN );
+* // returns true
+*
+* @example
+* var bool = disnan( 5.0 );
+* // returns false
+*/
+function disnan( x ) {
+	return dlaisnan( x, x );
+}
+
+
+// EXPORTS //
+
+module.exports = disnan;
diff --git a/lib/node_modules/@stdlib/lapack/base/disnan/package.json b/lib/node_modules/@stdlib/lapack/base/disnan/package.json
new file mode 100644
index 000000000000..16aa188adecd
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/disnan/package.json
@@ -0,0 +1,67 @@
+{
+  "name": "@stdlib/lapack/base/disnan",
+  "version": "0.0.0",
+  "description": "LAPACK auxiliary routine to test whether a double-precision floating-point number is NaN.",
+  "license": "Apache-2.0",
+  "author": {
+    "name": "The Stdlib Authors",
+    "url": "https://github.com/stdlib-js/stdlib/graphs/contributors"
+  },
+  "contributors": [
+    {
+      "name": "The Stdlib Authors",
+      "url": "https://github.com/stdlib-js/stdlib/graphs/contributors"
+    }
+  ],
+  "main": "./lib",
+  "directories": {
+    "benchmark": "./benchmark",
+    "doc": "./docs",
+    "example": "./examples",
+    "lib": "./lib",
+    "test": "./test"
+  },
+  "types": "./docs/types",
+  "scripts": {},
+  "homepage": "https://github.com/stdlib-js/stdlib",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/stdlib-js/stdlib.git"
+  },
+  "bugs": {
+    "url": "https://github.com/stdlib-js/stdlib/issues"
+  },
+  "dependencies": {},
+  "devDependencies": {},
+  "engines": {
+    "node": ">=0.10.0",
+    "npm": ">2.7.0"
+  },
+  "os": [
+    "aix",
+    "darwin",
+    "freebsd",
+    "linux",
+    "macos",
+    "openbsd",
+    "sunos",
+    "win32",
+    "windows"
+  ],
+  "keywords": [
+    "stdlib",
+    "stdmath",
+    "mathematics",
+    "math",
+    "lapack",
+    "disnan",
+    "nan",
+    "isnan",
+    "test",
+    "linear",
+    "algebra",
+    "subroutines",
+    "float64",
+    "double"
+  ]
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/disnan/test/test.js b/lib/node_modules/@stdlib/lapack/base/disnan/test/test.js
new file mode 100644
index 000000000000..6f40fa98542b
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/disnan/test/test.js
@@ -0,0 +1,91 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var tape = require( 'tape' );
+var PINF = require( '@stdlib/constants/float64/pinf' );
+var NINF = require( '@stdlib/constants/float64/ninf' );
+var disnan = require( './../lib' );
+
+
+// TESTS //
+
+tape( 'main export is a function', function test( t ) {
+	t.ok( true, __filename );
+	t.strictEqual( typeof disnan, 'function', 'main export is a function' );
+	t.end();
+});
+
+tape( 'the function has an arity of 1', function test( t ) {
+	t.strictEqual( disnan.length, 1, 'returns expected value' );
+	t.end();
+});
+
+tape( 'the function returns `true` when the argument is NaN', function test( t ) {
+	var bool;
+
+	bool = disnan( NaN );
+	t.strictEqual( bool, true, 'returns expected value' );
+
+	t.end();
+});
+
+tape( 'the function returns `false` when the argument is not NaN', function test( t ) {
+	var bool;
+
+	bool = disnan( 5.0 );
+	t.strictEqual( bool, false, 'returns expected value' );
+
+	bool = disnan( 0.0 );
+	t.strictEqual( bool, false, 'returns expected value' );
+
+	bool = disnan( -0.0 );
+	t.strictEqual( bool, false, 'returns expected value' );
+
+	bool = disnan( -3.14 );
+	t.strictEqual( bool, false, 'returns expected value' );
+
+	bool = disnan( 100.0 );
+	t.strictEqual( bool, false, 'returns expected value' );
+
+	bool = disnan( -100.0 );
+	t.strictEqual( bool, false, 'returns expected value' );
+
+	t.end();
+});
+
+tape( 'the function returns `false` when the argument is positive infinity', function test( t ) {
+	var bool;
+
+	bool = disnan( PINF );
+	t.strictEqual( bool, false, 'returns expected value' );
+
+	t.end();
+});
+
+tape( 'the function returns `false` when the argument is negative infinity', function test( t ) {
+	var bool;
+
+	bool = disnan( NINF );
+	t.strictEqual( bool, false, 'returns expected value' );
+
+	t.end();
+});