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The Author of Ratna Alañ juşā and the Binomial Expansion 101
Numbers of (he lagakriya are written, one below the other, in order. (For 4 letters in the metre, see the first column of the figure 1 given below).
Rows of cells are formed in front of these numbers. The number of cells in a row is equal to the number in front of which the row has been formed.
Unity is written in the topmost cell. Its double i. e., 2 is written below the cell containing unity. Again by doubling 2, 4 is obtained which is written below the cell containing 2. Also, unity is subtracted from 4. Thus, 3 is obtained which is written above the cell containing 4.
A number obtained after doubling in written below (the number which has been doubled) and that obtained after subtracting unity is written above (the number from which unity has been subtracted). The process, coatinued in order till the number equal to the sum of numbers of the lagakriyā (i. e., upto 2", for a metre having n letters) gives the meru for that metre. The figure gives the serial numbers of variations of the metre having 1 etc. monosyllable letters amidst all variations of the metres.
Two illustrations of the rule are contained in the Ratna Mañjūşā, one for a metre having 4 letters and the other for that having 5 letters.
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Fig. 1
लगक्रियाङ्कसंदोहसंख्या संपूर्णतो विधिम् । कुर्वीत तावदक श्च कोष्ठाः सर्वे स्युरङ्किताः ॥7॥ प्रस्तारो मेरुनामायमत्रच्छन्दोद्भवं भवेत् । एकलध्यादिवृ त्तानाम् उत्पत्तिस्थान निर्णयः ॥8॥
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