Merge pull request #76 from Laulo/patch-1

Update what_is_tnt.rst

Author: wiheto

docs/what_is_tnt.rst

@@ -35,7 +35,7 @@ When connections are undirected, it means that both nodes share the connection.
 Adding a time dimension
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-In the above formulation of networks :math:`A_{ij}` only has one edge. In a temporal network, a time-stamp is also included in the edge's tuple. Thus, binary edges are not expressed as 3-tuples (i,j,t) and weighted networks as 4 tuples (i,j,t,w). Connectivity matrices are now three dimensional: :math:`A_{ijt} = 1` in binary and :math:`A_{ijt} = w` in weighted networks.
+In the above formulation of networks :math:`A_{ij}` only has one edge. In a temporal network, a time-stamp is also included in the edge's tuple. Thus, binary edges are now expressed as 3-tuples (i,j,t) and weighted networks as 4 tuples (i,j,t,w). Connectivity matrices are now three dimensional: :math:`A_{ijt} = 1` in binary and :math:`A_{ijt} = w` in weighted networks.
 
 The time indices are an ordered sequence. This ordering can now reveal information about what is occurring in the network through time.