Necessary relationships peak assignments

Plots such as Fig. 2.15 can be made [18] for tetrad and other higher order probabilities (or fractions) as a function of Pm using the relationships given in Table 2.2. These are useful for peak assignments in NMR spectra (in which finer structures are observable), aided by certain necessary relationships (Table 2.3) among the frequencies of occurrences of sequences, which must hold regardless of the configurational statistics (Bemoullian or not). 

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