diff --git a/mpi/docs/zz-user-defined-datatypes.md b/mpi/docs/zz-user-defined-datatypes.md
index 9d2c20dec..952132fa6 100644
--- a/mpi/docs/zz-user-defined-datatypes.md
+++ b/mpi/docs/zz-user-defined-datatypes.md
@@ -385,168 +385,3 @@ MPI_Send(particle, 1000*sizeof(particle[0]), MPI_BYTE, ...);
- Ensuring the correct extent of the derived data type is important
- MPI provides constructors for several specific types
-
-# User-defined datatypes: other datatype constructors {.section}
-
-# MPI_TYPE_CONTIGUOUS
-
-MPI_Type_contiguous(`count`{.input}, `oldtype`{.input}, `newtype`{.output})
- : `count`{.input}
- : number of oldtypes
- : `oldtype`{.input}
- : old type
- : `newtype`{.output}
- : new datatype
-
-- Usage mainly for programming convenience
- - derived types in all communication calls
-
-
-
-```fortranfree
-! Using derived type
-call mpi_send(buf, 1, conttype, ...)
-```
-
-
-```fortranfree
-! Equivalent call with count and basic type
-call mpi_send(buf, count, MPI_REAL, ...)
-```
-
-
-
-
-# MPI_TYPE_INDEXED {.split-def-3}
-
-- Creates a new type from blocks comprising identical elements
- - The size and displacements of the blocks may vary
-
-MPI_Type_indexed(`count`{.input}, `blocklens`{.input}, `displs`{.input}, `oldtype`{.input}, `newtype`{.output})
- : `count`{.input}
- : number of blocks
-
- `blocklens`{.input}
- : lengths of the blocks (array)
-
- `displs`{.input}
- : displacements (array) in extent of oldtypes
-
- `oldtype`{.input}
- : original type
-
- `newtype`{.output}
- : new type
-
- `-`{.ghost}
- : `-`{.ghost}
-
-
-{.center width=100%}
-
-# Example: an upper triangular matrix
-
-
-```c
-/* Upper triangular matrix */
-double a[100][100];
-int disp[100], blocklen[100], int i;
-MPI_Datatype upper;
-/* compute start and size of rows */
-for (i=0; i<100; i++) {
- disp[i] = 100*i+i;
- blocklen[i] = 100-i;
-}
-/* create a datatype for upper tr matrix */
-MPI_Type_indexed(100,blocklen,disp,
- MPI_DOUBLE,&upper);
-MPI_Type_commit(&upper);
-/* ... send it ... */
-MPI_Send(a,1,upper,dest, tag, MPI_COMM_WORLD);
-MPI_Type_free(&upper);
-```
-
-
-
-{.center width=65%}
-
-
-# Subarray
-
-
-- Subarray datatype describes a N-dimensional subarray within a
-N-dimensional array
-- Array can have either C (row major) or Fortran (column major)
-ordering in memory
-
-
-
-{.center width=60%}
-
-
-
-# MPI_TYPE_CREATE_SUBARRAY {.split-def-3}
-
-
-MPI_Type_create_subarray(`ndims`{.input}, `sizes`{.input}, `subsizes`{.input}, `offsets`{.input}, `order`{.input}, `oldtype`{.input}, `newtype`{.output})
- : `ndims`{.input}
- : number of array dimensions
-
- `sizes`{.input}
- : number of array elements in each dimension (array)
-
- `subsizes`{.input}
- : number of subarray elements in each dimension (array)
-
- `offsets`{.input}
- : starting point of subarray in each dimension (array)
-
- `order`{.input}
- : storage order of the array. Either `MPI_ORDER_C` or
- `MPI_ORDER_FORTRAN`
-
- `oldtype`{.input}
- : oldtype
-
- `newtype`{.output}
- : resulting type
-
- `-`{.ghost}
- : `-`{.ghost}
-
-# Example: subarray
-
-
-
-```c
-int a_size[2] = {5,5};
-int sub_size[2] = {2,3};
-int sub_start[2] = {1,2};
-MPI_Datatype sub_type;
-double array[5][5];
-
-for(i = 0; i < a_size[0]; i++)
- for(j = 0; j < a_size[1]; j++)
- array[i][j] = rank;
-
-MPI_Type_create_subarray(2, a_size, sub_size,
- sub_start, MPI_ORDER_C, MPI_DOUBLE, &sub_type);
-
-MPI_Type_commit(&sub_type);
-
-if (rank==0)
- MPI_Recv(array[0], 1, sub_type, 1, 123,
- MPI_COMM_WORLD, MPI_STATUS_IGNORE);
-if (rank==1)
- MPI_Send(array[0], 1, sub_type, 0, 123,
- MPI_COMM_WORLD);
-
-MPI_Type_free(&sub_type);
-
-```
-
-
-
-{.center width=100%}
-