diff --git a/python/CMakeLists.txt b/python/CMakeLists.txt
index 9edd1b291..e536c749f 100644
--- a/python/CMakeLists.txt
+++ b/python/CMakeLists.txt
@@ -36,7 +36,10 @@ function(configure_build_install_location _library_name)
   )
 endfunction()
 
-pybind11_add_module(sdformat MODULE
+# sdformatX target already exists, use pysdformatX + OUTPUT_NAME to get
+# sdformatX file name generated and map BINDINGS_MODULE_NAME to sdformatX
+set(BINDINGS_MODULE_NAME "pysdformat${PROJECT_VERSION_MAJOR}")
+pybind11_add_module(${BINDINGS_MODULE_NAME} MODULE
   src/sdf/_gz_sdformat_pybind11.cc
   src/sdf/pyAirPressure.cc
   src/sdf/pyAltimeter.cc
@@ -84,11 +87,19 @@ pybind11_add_module(sdformat MODULE
   src/sdf/pybind11_helpers.cc
 )
 
-target_link_libraries(sdformat PRIVATE
+target_link_libraries(${BINDINGS_MODULE_NAME} PRIVATE
   ${PROJECT_LIBRARY_TARGET_NAME}
 )
 
-configure_build_install_location(sdformat)
+# different from the target name since the target name was not able to use
+# sdformatX since it conflicts with the project name
+target_compile_definitions(${BINDINGS_MODULE_NAME} PRIVATE
+  BINDINGS_MODULE_NAME=sdformat${PROJECT_VERSION_MAJOR})
+
+set_target_properties(${BINDINGS_MODULE_NAME} PROPERTIES
+  OUTPUT_NAME "sdformat${PROJECT_VERSION_MAJOR}")
+
+configure_build_install_location(${BINDINGS_MODULE_NAME})
 
 if (BUILD_TESTING)
   pybind11_add_module(sdformattest SHARED
diff --git a/python/src/sdf/_gz_sdformat_pybind11.cc b/python/src/sdf/_gz_sdformat_pybind11.cc
index 294819cde..681bf6990 100644
--- a/python/src/sdf/_gz_sdformat_pybind11.cc
+++ b/python/src/sdf/_gz_sdformat_pybind11.cc
@@ -62,7 +62,7 @@
 #include "pyVisual.hh"
 #include "pyWorld.hh"
 
-PYBIND11_MODULE(sdformat, m) {
+PYBIND11_MODULE(BINDINGS_MODULE_NAME, m) {
   m.doc() = "sdformat Python Library.";
 
   sdf::python::defineAirPressure(m);
diff --git a/python/test/pyAirPressure_TEST.py b/python/test/pyAirPressure_TEST.py
index f4ce64274..4abf3bccc 100644
--- a/python/test/pyAirPressure_TEST.py
+++ b/python/test/pyAirPressure_TEST.py
@@ -13,8 +13,8 @@
 # limitations under the License.
 
 from gz.math7 import Vector3d
-from sdformat import AirPressure, Noise
-import sdformat as sdf
+from sdformat13 import AirPressure, Noise
+import sdformat13 as sdf
 import unittest
 
 class AtmosphereTEST(unittest.TestCase):
diff --git a/python/test/pyAltimeter_TEST.py b/python/test/pyAltimeter_TEST.py
index 9189303c0..96253e5da 100644
--- a/python/test/pyAltimeter_TEST.py
+++ b/python/test/pyAltimeter_TEST.py
@@ -13,8 +13,8 @@
 # limitations under the License.
 
 from gz.math7 import Vector3d
-from sdformat import Altimeter, Noise
-import sdformat as sdf
+from sdformat13 import Altimeter, Noise
+import sdformat13 as sdf
 import unittest
 
 
diff --git a/python/test/pyAtmosphere_TEST.py b/python/test/pyAtmosphere_TEST.py
index 9d08a2a44..d2363c1af 100644
--- a/python/test/pyAtmosphere_TEST.py
+++ b/python/test/pyAtmosphere_TEST.py
@@ -13,8 +13,8 @@
 # limitations under the License.
 
 from gz.math7 import Pose3d, Temperature
-from sdformat import Atmosphere
-import sdformat as sdf
+from sdformat13 import Atmosphere
+import sdformat13 as sdf
 import unittest
 
 class AtmosphereTEST(unittest.TestCase):
diff --git a/python/test/pyBox_TEST.py b/python/test/pyBox_TEST.py
index df609011b..13e9a99ed 100644
--- a/python/test/pyBox_TEST.py
+++ b/python/test/pyBox_TEST.py
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 from gz.math7 import Vector3d
-from sdformat import Box
+from sdformat13 import Box
 import unittest
 
 class BoxTEST(unittest.TestCase):
diff --git a/python/test/pyCamera_TEST.py b/python/test/pyCamera_TEST.py
index ec0f26499..67471694b 100644
--- a/python/test/pyCamera_TEST.py
+++ b/python/test/pyCamera_TEST.py
@@ -15,8 +15,8 @@
 import copy
 from gz.math7 import Angle, Pose3d, Vector2d
 import math
-from sdformat import Camera
-import sdformat as sdf
+from sdformat13 import Camera
+import sdformat13 as sdf
 import unittest
 
 class CameraTEST(unittest.TestCase):
diff --git a/python/test/pyCapsule_TEST.py b/python/test/pyCapsule_TEST.py
index f2f694c17..8924c9ba2 100644
--- a/python/test/pyCapsule_TEST.py
+++ b/python/test/pyCapsule_TEST.py
@@ -18,7 +18,7 @@
 
 import math
 
-from sdformat import Capsule
+from sdformat13 import Capsule
 
 import unittest
 
diff --git a/python/test/pyCollision_TEST.py b/python/test/pyCollision_TEST.py
index a17f72f45..a0efbecdd 100644
--- a/python/test/pyCollision_TEST.py
+++ b/python/test/pyCollision_TEST.py
@@ -14,9 +14,9 @@
 
 import copy
 from gz.math7 import Pose3d
-from sdformat import (Box, Collision, Contact, Cylinder, Error, Geometry,
+from sdformat13 import (Box, Collision, Contact, Cylinder, Error, Geometry,
                       Plane, Surface, Sphere, SDFErrorsException)
-import sdformat as sdf
+import sdformat13 as sdf
 import unittest
 import math
 
diff --git a/python/test/pyCylinder_TEST.py b/python/test/pyCylinder_TEST.py
index cdd818b25..55b5ecf9a 100644
--- a/python/test/pyCylinder_TEST.py
+++ b/python/test/pyCylinder_TEST.py
@@ -18,7 +18,7 @@
 
 import math
 
-from sdformat import Cylinder
+from sdformat13 import Cylinder
 
 import unittest
 
diff --git a/python/test/pyEllipsoid_TEST.py b/python/test/pyEllipsoid_TEST.py
index f80bc4889..e66953bb9 100644
--- a/python/test/pyEllipsoid_TEST.py
+++ b/python/test/pyEllipsoid_TEST.py
@@ -15,7 +15,7 @@
 import copy
 from gz.math7 import Vector3d, Ellipsoidd
 import math
-from sdformat import Ellipsoid
+from sdformat13 import Ellipsoid
 import unittest
 
 
diff --git a/python/test/pyError_TEST.py b/python/test/pyError_TEST.py
index b8c82e595..84aa5e32d 100644
--- a/python/test/pyError_TEST.py
+++ b/python/test/pyError_TEST.py
@@ -13,8 +13,8 @@
 # limitations under the License.
 
 import copy
-from sdformat import Error
-import sdformat as sdf
+from sdformat13 import Error
+import sdformat13 as sdf
 import unittest
 
 class ErrorColor(unittest.TestCase):
diff --git a/python/test/pyForceTorque_TEST.py b/python/test/pyForceTorque_TEST.py
index 7a72bff90..8b3ae782b 100644
--- a/python/test/pyForceTorque_TEST.py
+++ b/python/test/pyForceTorque_TEST.py
@@ -13,8 +13,8 @@
 # limitations under the License.
 
 import copy
-from sdformat import ForceTorque, Noise
-import sdformat as sdf
+from sdformat13 import ForceTorque, Noise
+import sdformat13 as sdf
 import unittest
 
 class ForceTorqueTEST(unittest.TestCase):
diff --git a/python/test/pyFrame_TEST.py b/python/test/pyFrame_TEST.py
index aea698bc0..89b9bbd99 100644
--- a/python/test/pyFrame_TEST.py
+++ b/python/test/pyFrame_TEST.py
@@ -14,7 +14,7 @@
 
 import copy
 from gz.math7 import Pose3d
-from sdformat import Frame, Error, SDFErrorsException, ErrorCode
+from sdformat13 import Frame, Error, SDFErrorsException, ErrorCode
 import unittest
 import math
 
diff --git a/python/test/pyGeometry_TEST.py b/python/test/pyGeometry_TEST.py
index e1220ef4b..60811c558 100644
--- a/python/test/pyGeometry_TEST.py
+++ b/python/test/pyGeometry_TEST.py
@@ -13,9 +13,9 @@
 # limitations under the License.
 
 import copy
-from sdformat import Geometry, Box, Capsule, Cylinder, Ellipsoid, Mesh, Plane, Sphere
+from sdformat13 import Geometry, Box, Capsule, Cylinder, Ellipsoid, Mesh, Plane, Sphere
 from gz.math7 import Vector3d, Vector2d
-import sdformat as sdf
+import sdformat13 as sdf
 import unittest
 
 
diff --git a/python/test/pyGui_TEST.py b/python/test/pyGui_TEST.py
index 7c66ca4c4..7454ba590 100644
--- a/python/test/pyGui_TEST.py
+++ b/python/test/pyGui_TEST.py
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 import copy
-from sdformat import Gui, Plugin
+from sdformat13 import Gui, Plugin
 import unittest
 
 
diff --git a/python/test/pyHeightmap_TEST.py b/python/test/pyHeightmap_TEST.py
index ed6186eb4..6d2016e06 100644
--- a/python/test/pyHeightmap_TEST.py
+++ b/python/test/pyHeightmap_TEST.py
@@ -14,7 +14,7 @@
 
 import copy
 from gz.math7 import Vector3d
-from sdformat import Heightmap, HeightmapBlend, HeightmapTexture
+from sdformat13 import Heightmap, HeightmapBlend, HeightmapTexture
 import unittest
 
 
diff --git a/python/test/pyIMU_TEST.py b/python/test/pyIMU_TEST.py
index 42885ab7d..fb7b5ab27 100644
--- a/python/test/pyIMU_TEST.py
+++ b/python/test/pyIMU_TEST.py
@@ -14,8 +14,8 @@
 
 import copy
 from gz.math7 import Vector3d
-from sdformat import IMU, Noise
-import sdformat as sdf
+from sdformat13 import IMU, Noise
+import sdformat13 as sdf
 import unittest
 
 class IMUTest(unittest.TestCase):
diff --git a/python/test/pyJointAxis_TEST.py b/python/test/pyJointAxis_TEST.py
index c158a6f23..4d742de54 100644
--- a/python/test/pyJointAxis_TEST.py
+++ b/python/test/pyJointAxis_TEST.py
@@ -14,7 +14,7 @@
 
 import copy
 from gz.math7 import Pose3d, Vector3d
-from sdformat import JointAxis, Error, SDFErrorsException
+from sdformat13 import JointAxis, Error, SDFErrorsException
 import math
 import unittest
 
diff --git a/python/test/pyJoint_TEST.py b/python/test/pyJoint_TEST.py
index ccbea9487..a526b8f99 100644
--- a/python/test/pyJoint_TEST.py
+++ b/python/test/pyJoint_TEST.py
@@ -14,9 +14,9 @@
 
 import copy
 from gz.math7 import Pose3d, Vector3d
-from sdformat import (Joint, JointAxis, Error, SemanticPose, Sensor,
+from sdformat13 import (Joint, JointAxis, Error, SemanticPose, Sensor,
                       SDFErrorsException)
-import sdformat as sdf
+import sdformat13 as sdf
 import math
 import unittest
 
diff --git a/python/test/pyLidar_TEST.py b/python/test/pyLidar_TEST.py
index 871f7c2e6..3b81fa255 100644
--- a/python/test/pyLidar_TEST.py
+++ b/python/test/pyLidar_TEST.py
@@ -14,7 +14,7 @@
 
 import copy
 from gz.math7 import Angle, Pose3d, Vector3d, Helpers
-from sdformat import Lidar, Error, Noise
+from sdformat13 import Lidar, Error, Noise
 import math
 import unittest
 
diff --git a/python/test/pyLight_TEST.py b/python/test/pyLight_TEST.py
index d7d9657f6..f24717dee 100644
--- a/python/test/pyLight_TEST.py
+++ b/python/test/pyLight_TEST.py
@@ -14,8 +14,8 @@
 
 import copy
 from gz.math7 import Angle, Color, Pose3d, Vector3d
-from sdformat import Light, SDFErrorsException
-import sdformat as sdf
+from sdformat13 import Light, SDFErrorsException
+import sdformat13 as sdf
 import math
 import unittest
 
diff --git a/python/test/pyLink_TEST.py b/python/test/pyLink_TEST.py
index e4f8f2141..9f52d84a0 100644
--- a/python/test/pyLink_TEST.py
+++ b/python/test/pyLink_TEST.py
@@ -14,7 +14,7 @@
 
 import copy
 from gz.math7 import Pose3d, Inertiald, MassMatrix3d, Vector3d
-from sdformat import (Collision, Light, Link, Sensor, Visual,
+from sdformat13 import (Collision, Light, Link, Sensor, Visual,
                       SDFErrorsException)
 import unittest
 import math
diff --git a/python/test/pyMagnetometer_TEST.py b/python/test/pyMagnetometer_TEST.py
index bb0ece24c..9366c0fe3 100644
--- a/python/test/pyMagnetometer_TEST.py
+++ b/python/test/pyMagnetometer_TEST.py
@@ -14,8 +14,8 @@
 
 import copy
 from gz.math7 import Pose3d
-from sdformat import Magnetometer, Noise
-import sdformat as sdf
+from sdformat13 import Magnetometer, Noise
+import sdformat13 as sdf
 import unittest
 
 
diff --git a/python/test/pyMaterial_TEST.py b/python/test/pyMaterial_TEST.py
index 467682c91..98a5f8c03 100644
--- a/python/test/pyMaterial_TEST.py
+++ b/python/test/pyMaterial_TEST.py
@@ -13,9 +13,9 @@
 # limitations under the License.
 
 import copy
-from sdformat import Material, Pbr, PbrWorkflow
+from sdformat13 import Material, Pbr, PbrWorkflow
 from gz.math7 import Color
-import sdformat as sdf
+import sdformat13 as sdf
 import unittest
 
 
diff --git a/python/test/pyMesh_TEST.py b/python/test/pyMesh_TEST.py
index 4f8a0d145..0bc65d2e0 100644
--- a/python/test/pyMesh_TEST.py
+++ b/python/test/pyMesh_TEST.py
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 import copy
-from sdformat import Mesh
+from sdformat13 import Mesh
 from gz.math7 import Vector3d
 import unittest
 
diff --git a/python/test/pyModel_TEST.py b/python/test/pyModel_TEST.py
index 8abbac38f..7d756ceda 100644
--- a/python/test/pyModel_TEST.py
+++ b/python/test/pyModel_TEST.py
@@ -14,9 +14,9 @@
 
 import copy
 from gz.math7 import Pose3d, Vector3d
-from sdformat import (Plugin, Model, Joint, Link, Error, Frame, SemanticPose,
+from sdformat13 import (Plugin, Model, Joint, Link, Error, Frame, SemanticPose,
                       SDFErrorsException)
-import sdformat as sdf
+import sdformat13 as sdf
 import math
 import unittest
 
diff --git a/python/test/pyNavSat_TEST.py b/python/test/pyNavSat_TEST.py
index e6383f06a..49d8c4aca 100644
--- a/python/test/pyNavSat_TEST.py
+++ b/python/test/pyNavSat_TEST.py
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 import copy
-from sdformat import NavSat, Noise
+from sdformat13 import NavSat, Noise
 import unittest
 
 class NavSatColor(unittest.TestCase):
diff --git a/python/test/pyNoise_TEST.py b/python/test/pyNoise_TEST.py
index f8e47e61e..07d60b2b1 100644
--- a/python/test/pyNoise_TEST.py
+++ b/python/test/pyNoise_TEST.py
@@ -13,8 +13,8 @@
 # limitations under the License.
 
 import copy
-from sdformat import Noise
-import sdformat as sdf
+from sdformat13 import Noise
+import sdformat13 as sdf
 import math
 import unittest
 
diff --git a/python/test/pyParserConfig_TEST.py b/python/test/pyParserConfig_TEST.py
index d2516d98c..1c5558d43 100644
--- a/python/test/pyParserConfig_TEST.py
+++ b/python/test/pyParserConfig_TEST.py
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 import copy
-from sdformat import ParserConfig
+from sdformat13 import ParserConfig
 from sdformattest import source_file, test_file
 import unittest
 
diff --git a/python/test/pyParticleEmitter_TEST.py b/python/test/pyParticleEmitter_TEST.py
index 03cadde60..eb119b37b 100644
--- a/python/test/pyParticleEmitter_TEST.py
+++ b/python/test/pyParticleEmitter_TEST.py
@@ -14,7 +14,7 @@
 
 import copy
 from gz.math7 import Color, Pose3d, Vector3d, Helpers
-from sdformat import ParticleEmitter
+from sdformat13 import ParticleEmitter
 import unittest
 
 
diff --git a/python/test/pyPbr_TEST.py b/python/test/pyPbr_TEST.py
index 2faf52164..d3a6585d5 100644
--- a/python/test/pyPbr_TEST.py
+++ b/python/test/pyPbr_TEST.py
@@ -13,8 +13,8 @@
 # limitations under the License.
 
 import copy
-from sdformat import Pbr, PbrWorkflow
-import sdformat as sdf
+from sdformat13 import Pbr, PbrWorkflow
+import sdformat13 as sdf
 import unittest
 
 
diff --git a/python/test/pyPhysics_TEST.py b/python/test/pyPhysics_TEST.py
index d053a9d33..d8255799d 100644
--- a/python/test/pyPhysics_TEST.py
+++ b/python/test/pyPhysics_TEST.py
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 import copy
-from sdformat import Physics
+from sdformat13 import Physics
 import unittest
 
 
diff --git a/python/test/pyPlane_TEST.py b/python/test/pyPlane_TEST.py
index baa52b616..118304b01 100644
--- a/python/test/pyPlane_TEST.py
+++ b/python/test/pyPlane_TEST.py
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 import copy
-from sdformat import Plane
+from sdformat13 import Plane
 from gz.math7 import Vector3d, Vector2d, Planed
 import unittest
 
diff --git a/python/test/pyPlugin_TEST.py b/python/test/pyPlugin_TEST.py
index 058a7af87..c494c9985 100644
--- a/python/test/pyPlugin_TEST.py
+++ b/python/test/pyPlugin_TEST.py
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 import copy
-from sdformat import Plugin
+from sdformat13 import Plugin
 import unittest
 
 
diff --git a/python/test/pyPolyline_TEST.py b/python/test/pyPolyline_TEST.py
index 3a4f57a89..4f4b9ccc4 100644
--- a/python/test/pyPolyline_TEST.py
+++ b/python/test/pyPolyline_TEST.py
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 import copy
-from sdformat import Polyline
+from sdformat13 import Polyline
 from gz.math7 import Vector2d
 import unittest
 
diff --git a/python/test/pyRoot_TEST.py b/python/test/pyRoot_TEST.py
index c0909a449..d2fb58ef0 100644
--- a/python/test/pyRoot_TEST.py
+++ b/python/test/pyRoot_TEST.py
@@ -14,9 +14,9 @@
 
 import copy
 from gz.math7 import Vector3d, Pose3d
-from sdformat import (Error, Model, Light, Root, SDF_VERSION,
+from sdformat13 import (Error, Model, Light, Root, SDF_VERSION,
                       SDFErrorsException, SDF_PROTOCOL_VERSION, World)
-import sdformat as sdf
+import sdformat13 as sdf
 
 import unittest
 
diff --git a/python/test/pyScene_TEST.py b/python/test/pyScene_TEST.py
index d0d572133..b5398465b 100644
--- a/python/test/pyScene_TEST.py
+++ b/python/test/pyScene_TEST.py
@@ -14,7 +14,7 @@
 
 import copy
 from gz.math7 import Color
-from sdformat import Scene, Sky
+from sdformat13 import Scene, Sky
 import unittest
 
 
diff --git a/python/test/pySemanticPose_TEST.py b/python/test/pySemanticPose_TEST.py
index 06f3b5f6a..4218be6e3 100644
--- a/python/test/pySemanticPose_TEST.py
+++ b/python/test/pySemanticPose_TEST.py
@@ -14,7 +14,7 @@
 
 import copy
 from gz.math7 import Pose3d
-from sdformat import Link, SemanticPose
+from sdformat13 import Link, SemanticPose
 import unittest
 
 class semantic_poseTEST(unittest.TestCase):
diff --git a/python/test/pySensor_TEST.py b/python/test/pySensor_TEST.py
index 69bd50e87..6215941e1 100644
--- a/python/test/pySensor_TEST.py
+++ b/python/test/pySensor_TEST.py
@@ -14,10 +14,10 @@
 
 import copy
 from gz.math7 import Pose3d
-from sdformat import (AirPressure, Altimeter, Camera, IMU, ForceTorque, Lidar,
+from sdformat13 import (AirPressure, Altimeter, Camera, IMU, ForceTorque, Lidar,
                       Magnetometer, NavSat, Noise, Plugin, SemanticPose,
                       Sensor, SDFErrorsException)
-import sdformat as sdf
+import sdformat13 as sdf
 import unittest
 
 
diff --git a/python/test/pySky_TEST.py b/python/test/pySky_TEST.py
index 16c1dda18..1967d548a 100644
--- a/python/test/pySky_TEST.py
+++ b/python/test/pySky_TEST.py
@@ -14,7 +14,7 @@
 
 import copy
 from gz.math7 import Angle, Color
-from sdformat import Sky
+from sdformat13 import Sky
 import unittest
 
 
diff --git a/python/test/pySphere_TEST.py b/python/test/pySphere_TEST.py
index d72b6536c..792719f27 100644
--- a/python/test/pySphere_TEST.py
+++ b/python/test/pySphere_TEST.py
@@ -15,7 +15,7 @@
 import copy
 from gz.math7 import Sphered
 import math
-from sdformat import Sphere
+from sdformat13 import Sphere
 import unittest
 
 class SphereTEST(unittest.TestCase):
diff --git a/python/test/pySurface_TEST.py b/python/test/pySurface_TEST.py
index 86c4404f8..b40130464 100644
--- a/python/test/pySurface_TEST.py
+++ b/python/test/pySurface_TEST.py
@@ -14,7 +14,7 @@
 
 import copy
 from gz.math7 import Vector3d
-from sdformat import Surface, Contact, Friction, ODE
+from sdformat13 import Surface, Contact, Friction, ODE
 import unittest
 
 
diff --git a/python/test/pyVisual_TEST.py b/python/test/pyVisual_TEST.py
index 65020546c..91a0f1c4b 100644
--- a/python/test/pyVisual_TEST.py
+++ b/python/test/pyVisual_TEST.py
@@ -14,8 +14,8 @@
 
 import copy
 from gz.math7 import Pose3d, Color
-from sdformat import Geometry, Material, Visual, Plugin, SDFErrorsException
-import sdformat as sdf
+from sdformat13 import Geometry, Material, Visual, Plugin, SDFErrorsException
+import sdformat13 as sdf
 import unittest
 import math
 
diff --git a/python/test/pyWorld_TEST.py b/python/test/pyWorld_TEST.py
index 583b1aa5f..6c053bdd4 100644
--- a/python/test/pyWorld_TEST.py
+++ b/python/test/pyWorld_TEST.py
@@ -14,8 +14,8 @@
 
 import copy
 from gz.math7 import Color, Pose3d, Vector3d, SphericalCoordinates
-from sdformat import Atmosphere, Gui, Physics, Plugin, Error, Frame, Light, Model, Scene, World
-import sdformat as sdf
+from sdformat13 import Atmosphere, Gui, Physics, Plugin, Error, Frame, Light, Model, Scene, World
+import sdformat13 as sdf
 import unittest
 import math