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Table 1

Comparison of the number of measurements versus the number of free parameters for given spot numbers and different methods using pairs of drawings.

Spots Measurements Parameters

2 8 8
3 12 10
4 16 12
5 20 14
6 24 16
7 28 18
... ... ...
20 80 44

Notes. The maximum number of common spots that appeared in Staudacher’s drawings is 20.

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