python-control
diff --git a/‎control/canonical.py‎
Lines changed: 4 additions & 4 deletions b/‎control/canonical.py‎
Lines changed: 4 additions & 4 deletions
diff --git a/‎control/exception.py‎
Lines changed: 34 additions & 12 deletions b/‎control/exception.py‎
Lines changed: 34 additions & 12 deletions
diff --git a/‎control/margins.py‎
Lines changed: 2 additions & 2 deletions b/‎control/margins.py‎
Lines changed: 2 additions & 2 deletions
@@ -10,7 +10,7 @@
 from numpy.linalg import matrix_rank, solve
 from scipy.linalg import schur
 
-from .exception import ControlNotImplemented, ControlSlycot
+from .exception import ControlNotImplemented, ControlSlicot
 from .iosys import issiso
 from .statefbk import ctrb, obsv
 from .statesp import StateSpace, _convert_to_statespace
@@ -330,15 +330,15 @@ def _bdschur_condmax_search(aschur, tschur, condmax):
 
     Notes
     -----
-    Outputs as for slycot.mb03rd.
+    Outputs as for slicot.mb03rd.
 
     `aschur`, `tschur` are as returned by scipy.linalg.schur.
 
     """
     try:
-        from slycot import mb03rd
+        from .slicot_compat import mb03rd
     except ImportError:
-        raise ControlSlycot("can't find slycot module 'mb03rd'")
+        raise ControlSlicot("can't find slicot module 'mb03rd'")
 
     # see notes on RuntimeError below
     pmaxlower = None
 
@@ -5,10 +5,28 @@
 
 """Exception definitions for the control package."""
 
-class ControlSlycot(ImportError):
-    """Slycot import failed."""
+import warnings
+
+
+class ControlSlicot(ImportError):
+    """Slicot import failed."""
     pass
 
+
+def _deprecated_alias(old_name, new_name):
+    """Issue deprecation warning for renamed class/function."""
+    warnings.warn(
+        f"{old_name} is deprecated, use {new_name} instead",
+        DeprecationWarning, stacklevel=3
+    )
+
+
+class ControlSlycot(ControlSlicot):
+    """Deprecated alias for ControlSlicot."""
+    def __init__(self, *args, **kwargs):
+        _deprecated_alias('ControlSlycot', 'ControlSlicot')
+        super().__init__(*args, **kwargs)
+
 class ControlDimension(ValueError):
     """Raised when dimensions of system objects are not correct."""
     pass
@@ -29,18 +47,22 @@ class ControlNotImplemented(NotImplementedError):
     """Functionality is not yet implemented."""
     pass
 
-# Utility function to see if Slycot is installed
-slycot_installed = None
-def slycot_check():
-    """Return True if Slycot is installed, otherwise False."""
-    global slycot_installed
-    if slycot_installed is None:
+# Utility function to see if slicot is installed
+slicot_installed = None
+def slicot_check():
+    """Return True if slicot is installed, otherwise False."""
+    global slicot_installed
+    if slicot_installed is None:
         try:
-            import slycot  # noqa: F401
-            slycot_installed = True
+            import slicot  # noqa: F401
+            slicot_installed = True
         except:
-            slycot_installed = False
-    return slycot_installed
+            slicot_installed = False
+    return slicot_installed
+
+
+# Backwards-compatible alias (no warning to avoid noise in existing code)
+slycot_check = slicot_check
 
 
 # Utility function to see if pandas is installed
 
@@ -16,7 +16,7 @@
 from .iosys import issiso
 from .ctrlutil import mag2db
 try:
-    from slycot import ab13md
+    from .slicot_compat import ab13md
 except ImportError:
     ab13md = None
 
@@ -577,7 +577,7 @@ def disk_margins(L, omega, skew=0.0, returnall=False):
     # Need slycot if L is MIMO, for mu calculation
     if not L.issiso() and ab13md == None:
         raise ControlMIMONotImplemented(
-            "Need slycot to compute MIMO disk_margins")
+            "Need slicot to compute MIMO disk_margins")
 
     # Get dimensions of feedback system
     num_loops = statesp.ss(L).C.shape[0]