diff --git a/geomfum/_registry.py b/geomfum/_registry.py
index f9d8ae0..676ec71 100644
--- a/geomfum/_registry.py
+++ b/geomfum/_registry.py
@@ -1,5 +1,7 @@
 import abc
 import inspect
+import re
+import sys
 
 from geomfum._utils import has_package
 
@@ -219,46 +221,47 @@ class LaplacianFinderRegistry(MeshWhichRegistry):
     MAP = {}
 
 
-register_laplacian_finder = LaplacianFinderRegistry.register
-
-
 class HeatKernelSignatureRegistry(WhichRegistry):
     MAP = {}
 
 
-register_heat_kernel_signature = HeatKernelSignatureRegistry.register
-
-
 class WaveKernelSignatureRegistry(WhichRegistry):
     MAP = {}
 
 
-register_wave_kernel_signature = WaveKernelSignatureRegistry.register
-
-
 class FaceValuedGradientRegistry(WhichRegistry):
     MAP = {}
 
 
-register_face_valued_gradient = FaceValuedGradientRegistry.register
-
-
 class FaceDivergenceOperatorRegistry(WhichRegistry):
     MAP = {}
 
 
-register_face_divergence_operator = FaceDivergenceOperatorRegistry.register
+class FaceOrientationOperatorRegistry(WhichRegistry):
+    MAP = {}
 
 
-class FaceOrientationOperatorRegistry(WhichRegistry):
+class HierarchicalMeshRegistry(WhichRegistry):
     MAP = {}
 
 
-register_face_orientation_operator = FaceOrientationOperatorRegistry.register
+def _create_register_funcs(module):
+    # create `register_` functions automatically
+    for name, method in inspect.getmembers(module):
+        if not (
+            hasattr(method, "__bases__")
+            and abc.ABC not in method.__bases__
+            and name.endswith("Registry")
+        ):
+            continue
 
+        # upper case split
+        name_ls = ["register"] + [
+            word.lower() for word in re.findall("[A-Z][^A-Z]*", name)[:-1]
+        ]
+        new_name = "_".join(name_ls)
 
-class HierarchicalMeshRegistry(WhichRegistry):
-    MAP = {}
+        setattr(module, new_name, method.register)
 
 
-register_hierarchical_mesh = HierarchicalMeshRegistry.register
+_create_register_funcs(sys.modules[__name__])
diff --git a/geomfum/laplacian/_laplacian.py b/geomfum/laplacian.py
similarity index 83%
rename from geomfum/laplacian/_laplacian.py
rename to geomfum/laplacian.py
index 767e747..6a05bf8 100644
--- a/geomfum/laplacian/_laplacian.py
+++ b/geomfum/laplacian.py
@@ -1,8 +1,34 @@
+"""Laplacian-related algorithms."""
+
+import abc
+
+import geomfum.wrap as _wrap  # noqa (for register)
 from geomfum._registry import LaplacianFinderRegistry, MeshWhichRegistryMixins
 from geomfum.basis import LaplaceEigenBasis
 from geomfum.numerics.eig import ScipyEigsh
 
 
+class BaseLaplacianFinder(abc.ABC):
+    """Algorithm to find the Laplacian."""
+
+    @abc.abstractmethod
+    def __call__(self, shape):
+        """Apply algorithm.
+
+        Parameters
+        ----------
+        shape : Shape
+            Shape.
+
+        Returns
+        -------
+        stiffness_matrix : array-like, shape=[n_vertices, n_vertices]
+            Stiffness matrix.
+        mass_matrix : array-like, shape=[n_vertices, n_vertices]
+            Mass matrix.
+        """
+
+
 class LaplacianFinder(MeshWhichRegistryMixins):
     """Algorithm to find the Laplacian."""
 
diff --git a/geomfum/laplacian/__init__.py b/geomfum/laplacian/__init__.py
deleted file mode 100644
index d313864..0000000
--- a/geomfum/laplacian/__init__.py
+++ /dev/null
@@ -1,6 +0,0 @@
-"""Laplacian-related algorithms."""
-
-import geomfum.wrap as _wrap  # for register
-
-from ._base import BaseLaplacianFinder
-from ._laplacian import LaplacianFinder, LaplacianSpectrumFinder
diff --git a/geomfum/laplacian/_base.py b/geomfum/laplacian/_base.py
deleted file mode 100644
index da2da2c..0000000
--- a/geomfum/laplacian/_base.py
+++ /dev/null
@@ -1,22 +0,0 @@
-import abc
-
-
-class BaseLaplacianFinder(abc.ABC):
-    """Algorithm to find the Laplacian."""
-
-    @abc.abstractmethod
-    def __call__(self, shape):
-        """Apply algorithm.
-
-        Parameters
-        ----------
-        shape : Shape
-            Shape.
-
-        Returns
-        -------
-        stiffness_matrix : array-like, shape=[n_vertices, n_vertices]
-            Stiffness matrix.
-        mass_matrix : array-like, shape=[n_vertices, n_vertices]
-            Mass matrix.
-        """
diff --git a/geomfum/wrap/geopext.py b/geomfum/wrap/geopext.py
index 24ade4c..e34e4c9 100644
--- a/geomfum/wrap/geopext.py
+++ b/geomfum/wrap/geopext.py
@@ -4,7 +4,7 @@
 import numpy as np
 import scipy
 
-from geomfum.laplacian._base import BaseLaplacianFinder
+from geomfum.laplacian import BaseLaplacianFinder
 
 
 class GeopextMeshLaplacianFinder(BaseLaplacianFinder):
diff --git a/geomfum/wrap/igl.py b/geomfum/wrap/igl.py
index 46fd5e3..dad7fd9 100644
--- a/geomfum/wrap/igl.py
+++ b/geomfum/wrap/igl.py
@@ -2,7 +2,7 @@
 
 import igl
 
-from geomfum.laplacian._base import BaseLaplacianFinder
+from geomfum.laplacian import BaseLaplacianFinder
 
 
 class IglMeshLaplacianFinder(BaseLaplacianFinder):
diff --git a/geomfum/wrap/pyfm.py b/geomfum/wrap/pyfm.py
index b3cf7f0..540a898 100644
--- a/geomfum/wrap/pyfm.py
+++ b/geomfum/wrap/pyfm.py
@@ -6,7 +6,7 @@
 import scipy
 
 from geomfum.descriptor._base import SpectralDescriptor
-from geomfum.laplacian._base import BaseLaplacianFinder
+from geomfum.laplacian import BaseLaplacianFinder
 from geomfum.operator import FunctionalOperator, VectorFieldOperator
 
 
diff --git a/geomfum/wrap/robust.py b/geomfum/wrap/robust.py
index 22b6e03..ba3569b 100644
--- a/geomfum/wrap/robust.py
+++ b/geomfum/wrap/robust.py
@@ -2,7 +2,7 @@
 
 import robust_laplacian
 
-from geomfum.laplacian._base import BaseLaplacianFinder
+from geomfum.laplacian import BaseLaplacianFinder
 
 
 class RobustMeshLaplacianFinder(BaseLaplacianFinder):