There are several symbolic acts descriptive of the siege.
It will be shown later that all invariants, single or simultaneous, are expressible in terms of symbolic products.
Symbolic Identities.- For the purpose of manipulating symbolic expressions it is necessary to be in possession of certain simple identities which connect certain symbolic products.
Of the symbolic factors of the form are replaced by IA others in which new variables y1, y2 replace the old variables x1, x 2 .
The loculi were intact and the epitaphs still in their places, so that " they form a kind of museum, in which the development, the formulae, and the symbolic figures of Christian epigraphy, from its origin to the end of the 3rd or 4th century, can be notified and contemplated, not in artificial specimens as in the Lateran, but in the genuine and living reality of their original condition."