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annotate src/LazyTensors/tensor_mapping.jl @ 348:7fe43d902a27 refactor/remove_dynamic_size_tensormapping

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Start trying to change LazyTensors
author Jonatan Werpers <jonatan@werpers.com>
date Sat, 26 Sep 2020 15:20:18 +0200
parents 01b851161018
children cd509e57f898
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1 """
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2 TensorMapping{T,R,D}
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3
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4 Describes a mapping of a D dimension tensor to an R dimension tensor.
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5 The action of the mapping is implemented through the method
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7 apply(t::TensorMapping{T,R,D}, v::AbstractArray{T,D}, I::Vararg) where {R,D,T}
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9 The size of the range and domain that the operator works with should be returned by
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10 the functions
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12 range_size(::TensorMapping)
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13 domain_size(::TensorMapping)
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15 to allow querying for one or the other.
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17 Optionally the action of the transpose may be defined through
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18 apply_transpose(t::TensorMapping{T,R,D}, v::AbstractArray{T,D}, I::Vararg) where {R,D,T}
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19 """
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20 abstract type TensorMapping{T,R,D} end
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21 export TensorMapping
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23 """
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24 apply(t::TensorMapping{T,R,D}, v::AbstractArray{T,D}, I::Vararg) where {R,D,T}
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26 Return the result of the mapping for a given index.
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27 """
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28 function apply end
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29 export apply
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30
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31 """
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32 apply_transpose(t::TensorMapping{T,R,D}, v::AbstractArray{T,R}, I::Vararg) where {R,D,T}
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33
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34 Return the result of the transposed mapping for a given index.
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35 """
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36 function apply_transpose end
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37 export apply_transpose
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38
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39 """
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40 Return the dimension of the range space of a given mapping
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41 """
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42 range_dim(::TensorMapping{T,R,D}) where {T,R,D} = R
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44 """
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45 Return the dimension of the domain space of a given mapping
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46 """
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47 domain_dim(::TensorMapping{T,R,D}) where {T,R,D} = D
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49 export range_dim, domain_dim
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51 """
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52 range_size(M::TensorMapping)
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54 Return the range size for the mapping.
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55 """
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56 function range_size end
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58 """
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59 domain_size(M::TensorMapping)
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61 Return the domain size for the mapping.
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62 """
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63 function domain_size end
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65 export range_size, domain_size
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67 # TODO: Think about boundschecking!