## Deriving *d* Values for {*c[d]*} Description of Elements
of L.d.a.s

###
-- all elements are characterized by
some 2^{a}*3^{b}*n + c

-- that's dn+c, where
d=2^{a}*3^{b}

-- let *m* be the number of elements in the left descent assembly
(t doesn't count)

-- l.d.a.s may be denoted as e(s|b)_{m-1}t, 1<=m<=infinity0br> i.e. are headed by an extension,
contain
m-1 s- and/or b-steps in

some order, and terminate as the
result of reaching a leaf at the last step

-- the *a* and *b* values can be assigned without calculation

-- for the extension element, a=3, b=m

-- in each step down any l.d.a., *a* increases
by 1 for s-steps, 2 for b-steps; *b* decreases by 1

-- e.g. consider the l.d.a. *esbt*; m=3

-- coefficient of successive elements
are 2^{3}*3^{3}; 2^{4}*3^{2};
2^{6}*3^{1}

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