E) In the case that the chain deviates from the regular straight
form (fig. i) additional rules can be derived which facilitate making
up the tensor. The chain in fig. 2 is taken as an example.
The numbers are given according to the same system as in III, A.
The angle conditions are:
5
The matrix of the normal-equations and its inverse one are the
same as derived in III, A, and therefore the absolute values of the
cofactors will be the same. The signs however are different and
cause changes in the tensor. The corrections beginning with e1
have the opposite signs and a second reversal takes place at e11,
compared with the angle-conditions in III, A. This appears also
in the part of the tensor cp =1, .,\n in the rows and columns
respectively numbers 7 and 11. The symmetry1) is now disturbed.
10
1
0
7
L.
10
11
12.
13
14
15
16
17
18
19
1
2
I
«1
-1
1
-1
5
1
-1
-1
4
+1
-1
1
-1
1
•to.
6
1
-1
7
+1
-1
*1
8
-1
+1
-1
9
I
+1
-1
1
Fig- 3
II See property 4).
