Documentation update and sfbndfix included in Dw.

docs/src/dirac.md

@@ -1,7 +1,7 @@
 
 # Dirac operator
 
-The module `Dirac` has the necessary stuctures and function 
+The module `Dirac` has the necessary structures and functions 
 to simulate non-dynamical 4-dimensional Wilson fermions.
 
 There are two main data structures in this module, the structure [`DiracParam`](@ref)
@@ -18,7 +18,7 @@ DiracWorkspace
 
 The workspace stores four fermion fields, namely `.sr`, `.sp`, `.sAp` and `.st`, used
 for different purposes. If the representation is either `SU2fund` of `SU3fund`, an extra
-field with values in `U2alg`/`U3alg` is created to store the clover, used for the improvent.
+field with values in `U2alg`/`U3alg` is created to store the clover, used for the improvement.
 
 ## Functions
 
@@ -38,7 +38,7 @@ where $$m_0$$ and $$\theta$$ are respectively the values `.m0` and `.th` of [`Di
 Note that $$|\theta(\mu)|=1$$ is not built into the code, so it should be imposed explicitly. 
 
 Additionally, if |`dpar.csw`| > 1.0E-10, the clover term is assumed to be stored in `ymws.csw`, which
-can be done via the [`Csw!`](@ref) function. In this case we have the Sheikholeslami–Wohlert (SW) term
+can be done via the [`Csw!`](@ref) function. In this case we have the Sheikholeslami-Wohlert (SW) term
 in `Dw!`:
 
 ```math
@@ -53,7 +53,7 @@ improvement term
 ```math
     \delta D_w^{SF} = (c_t -1) (\delta_{x_4,a} \psi(\vec{x}) + \delta_{x_4,T-a} \psi(\vec{x}))
 ```
-is added. Since the time-slice $$t=T$$ is not stored, this accounts to modifying the second
+is added. Since the time-slice $$t=T$$ is not stored, this accounts for modifying the second
 and last time-slice. 
 
 Note that the Dirac operator for SF boundary conditions assumes that the value of the field 
@@ -63,11 +63,6 @@ in the first time-slice is zero. To enforce this, we have the function
 SF_bndfix!
 ```
 
-Note that this is not enforced in the Dirac operators, so if the field `so` does not satisfy SF
-boundary conditions, it will not (in general) satisfy them after applying [`Dw!`](@ref) 
-or [`g5Dw!`](@ref). This function is called for the function [`DwdagDw!`](@ref), so in this case
-`so` will always be a proper SF field after calling this function.
-
 The function [`Csw!`](@ref) is used to store the clover in `dws.csw`. It is computed 
 according to the expression
 
@@ -97,8 +92,8 @@ F[b,4,r] \to F_{31}(b,r) ,\quad F[b,5,r] \to F_{32}(b,r) ,\quad F[b,6,r] \to F_{
 ```
 where $$(b,r)$$ labels the lattice points as explained in the module `Space`
 
-The function [`pfrandomize!`](@ref), userfull for stochastic sources, is also present. It
-randomizes a  fermion field either in all the space or in a specifit time-slice.
+The function [`pfrandomize!`](@ref), userful for stochastic sources, is also present. It
+randomizes a fermion field, either in all the space or in a specific time-slice.
 
 The generic interface of these functions reads
 

docs/src/fields.md

@@ -1,16 +1,18 @@
 
 # Lattice fields
 
-The module `Fields` include simple routines to define a few typical
+The module `Fields` includes simple routines to define a few typical
 fields. Fields are simple `CuArray` types with special memory
 layout. A field always has an associated elemental type (i.e. for 
 gauge fields `SU3`, for scalar fields `Float64`). We have:
-- scalar fields: One elemental type in each spacetime point.
-- vector field: One elemental type at each spacetime point and
+- Scalar fields: One elemental type in each spacetime point.
+- Vector field: One elemental type at each spacetime point and
   direction.
 - `N` scalar fields: `N` elemental types at each spacetime point.
+- Tensor fields: One elemental type at each spacetime point and
+  plane. They are to be thought of as symmetric tensors.
 
-Fields can have **naturaL indexing**, where the memory layout follows
+Fields can have **natural indexing**, where the memory layout follows
 the point-in-block and block indices (see
 [`SpaceParm`](@ref)). Fields can also have **lexicographic indexing**,
 where points are labelled by a D-dimensional index (see [`scalar_field_point`](@ref)).
@@ -21,6 +23,7 @@ where points are labelled by a D-dimensional index (see [`scalar_field_point`](@
 ```@docs
 scalar_field
 vector_field
+tensor_field
 nscalar_field
 scalar_field_point
 ```

docs/src/groups.md

@@ -1,7 +1,7 @@
 
 # Groups and Algebras
 
-The module `Groups` contain generic data types to deal with group and
+The module `Groups` contains generic data types to deal with group and
 algebra elements. Group elements $$g\in SU(N)$$ are represented in
 some compact notation. For the case $$N=2$$ we use two complex numbers
 (Caley-Dickson representation, i.e. $$g=(z_1,z_2)$$ with
@@ -79,7 +79,7 @@ elements. The objective is to get an idea on how group operations
 We can generate some random group elements.
 ```@repl exs
 # Generate random groups elements, 
-# check they are actually from the grup
+# check they are actually from the group
 g = rand(SU2{Float64})
 println("Are we in a group?: ", isgroup(g))
 g = rand(SU3{Float64})

docs/src/solvers.md

@@ -29,13 +29,15 @@ is given by $$|$$``dws.sr``$$|^2$$.
 
 ## Propagators.jl
 
-In this file, we define a couple of useful functions to obtain certain
+In this file, we define some useful functions to obtain certain
 propagators.
 
 ```@docs
 propagator!
 ```
 
+Note that the indexing in Julia starts at 1, so the first tiime slice is t=1.
+
 Internally, this function solves the equation 
 
 ```math

docs/src/spinors.md

@@ -6,7 +6,7 @@ which is a NS-tuple with values in G.
 The functions `norm`, `norm2`, `dot`, `*`, `/`, `/`, `+`, `-`, `imm` and `mimm`, 
 if defined for G, are extended to Spinor{NS,G} for general NS.
 
-For the 4d case where NS = 4 there are some specific functions to implement different
+For the 4D case, where NS = 4, there are some specific functions to implement different
 operations with the gamma matrices. The convention for these matrices is
 
 
@@ -79,7 +79,6 @@ using LatticeGPU # hide
 ```
 ```@repl exs
 spin = Spinor{4,Complex{Float64}}((1.0,im*0.5,2.3,0.0))
-println(spin)
 println(dmul(Gamma{4},spin))
 println(pmul(Pgamma{2,-1},spin))