--- a/+scheme/Schrodinger.m	Fri Mar 29 14:50:50 2019 -0700
+++ b/+scheme/Schrodinger.m	Wed Apr 10 11:00:27 2019 -0700
@@ -114,6 +114,7 @@
         % op        -- string or a cell array of strings
         % boundary  -- string
         function varargout = getBoundaryOperator(obj, op, boundary)
+            assertIsMember(boundary, {'l', 'r'})
 
             if ~iscell(op)
                 op = {op};
@@ -127,8 +128,6 @@
                         e = obj.e_l;
                     case 'r'
                         e = obj.e_r;
-                    otherwise
-                        error('No such boundary: boundary = %s',boundary);
                     end
                     varargout{i} = e;
 
@@ -138,24 +137,33 @@
                         d = obj.d1_l;
                     case 'r'
                         d = obj.d1_r;
-                    otherwise
-                        error('No such boundary: boundary = %s',boundary);
                     end
                     varargout{i} = d;
                 end
             end
         end
 
+        % Returns square boundary quadrature matrix, of dimension
+        % corresponding to the number of boundary points
+        %
+        % boundary -- string
+        % Note: for 1d diffOps, the boundary quadrature is the scalar 1.
+        function H_b = getBoundaryQuadrature(obj, boundary)
+            assertIsMember(boundary, {'l', 'r'})
+
+            H_b = 1;
+        end
+
         % Returns the boundary sign. The right boundary is considered the positive boundary
         % boundary -- string
         function s = getBoundarySign(obj, boundary)
+            assertIsMember(boundary, {'l', 'r'})
+
             switch boundary
                 case {'r'}
                     s = 1;
                 case {'l'}
                     s = -1;
-                otherwise
-                    error('No such boundary: boundary = %s',boundary);
             end
         end
 
@@ -164,14 +172,4 @@
         end
 
     end
-
-    methods(Static)
-        % Calculates the matrcis need for the inteface coupling between boundary bound_u of scheme schm_u
-        % and bound_v of scheme schm_v.
-        %   [uu, uv, vv, vu] = inteface_couplong(A,'r',B,'l')
-        function [uu, uv, vv, vu] = interface_coupling(schm_u,bound_u,schm_v,bound_v)
-            [uu,uv] = schm_u.interface(bound_u,schm_v,bound_v);
-            [vv,vu] = schm_v.interface(bound_v,schm_u,bound_u);
-        end
-    end
-end
\ No newline at end of file
+end