diff --git a/python/CMakeLists.txt b/python/CMakeLists.txt
index 90d3e6e..e2ea884 100644
--- a/python/CMakeLists.txt
+++ b/python/CMakeLists.txt
@@ -30,6 +30,10 @@ IF(CYTHON)
     COMMAND ${CYTHON} --cplus -o ${CMAKE_CURRENT_BINARY_DIR}/_project.cpp ${CMAKE_CURRENT_SOURCE_DIR}/_project.pyx
     DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/_project.pyx ${CMAKE_CURRENT_SOURCE_DIR}/project_tool.hpp ) 
 
+  add_custom_command(
+    OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/_cosmomath.cpp
+    COMMAND ${CYTHON} --cplus -o ${CMAKE_CURRENT_BINARY_DIR}/_cosmomath.cpp ${CMAKE_CURRENT_SOURCE_DIR}/_cosmomath.pyx
+    DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/_cosmomath.pyx ) 
 ENDIF(CYTHON)
 
 
@@ -38,12 +42,13 @@ add_library(_cosmo_power MODULE ${CMAKE_CURRENT_BINARY_DIR}/_cosmo_power.cpp)
 add_library(_cosmo_cic MODULE ${CMAKE_CURRENT_BINARY_DIR}/_cosmo_cic.cpp)
 add_library(_fast_interp MODULE ${CMAKE_CURRENT_BINARY_DIR}/_fast_interp.cpp)
 add_library(_project MODULE ${CMAKE_CURRENT_BINARY_DIR}/_project.cpp)
+add_library(_cosmomath MODULE ${CMAKE_CURRENT_BINARY_DIR}/_cosmomath.cpp)
 target_include_directories(_cosmotool PRIVATE ${PYTHON_INCLUDES}) 
 target_include_directories(_cosmo_power PRIVATE ${PYTHON_INCLUDES}) 
 target_include_directories(_cosmo_cic PRIVATE ${PYTHON_INCLUDES}) 
 target_include_directories(_fast_interp PRIVATE ${PYTHON_INCLUDES}) 
 target_include_directories(_project PRIVATE ${PYTHON_INCLUDES}) 
-
+target_include_directories(_cosmomath PRIVATE ${PYTHON_INCLUDES})
 
 SET(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -Bsymbolic-functions")
 if(APPLE)
@@ -53,10 +58,11 @@ endif()
 target_link_libraries(_cosmotool PRIVATE ${CosmoTool_local}  ${GSL_LIBRARIES})
 target_link_libraries(_cosmo_power PRIVATE ${CosmoTool_local} ${GSL_LIBRARIES})
 target_link_libraries(_cosmo_cic PRIVATE ${CosmoTool_local}  ${GSL_LIBRARIES})
+target_link_libraries(_cosmomath PRIVATE ${CosmoTool_local} ${GSL_LIBRARIES})
 target_link_libraries(_project )
 target_link_libraries(_fast_interp PRIVATE ${CosmoTool_local} )
 
-SET(ct_TARGETS   _cosmotool _project _cosmo_power _cosmo_cic _fast_interp )
+SET(ct_TARGETS   _cosmotool _project _cosmo_power _cosmo_cic _fast_interp _cosmomath)
 
 if (Boost_FOUND)
   message(STATUS "Building bispectrum support (path = ${Boost_INCLUDE_DIRS})")
diff --git a/python/cosmotool/__init__.py b/python/cosmotool/__init__.py
index c5b1c79..fd1eb0e 100644
--- a/python/cosmotool/__init__.py
+++ b/python/cosmotool/__init__.py
@@ -3,6 +3,7 @@ from ._project import *
 from ._cosmo_power import *
 from ._cosmo_cic import *
 from ._fast_interp import *
+from ._cosmomath import *
 from .grafic import writeGrafic, writeWhitePhase, readGrafic, readWhitePhase
 from .borg import read_borg_vol
 from .cic import cicParticles