In a study of the effect of soil bacteria upon the etching power of the roots of Canada field peas upon polished marble, it has been shown that the presence of the bacteria increases the etching power of the roots.

Error coefficients are ubiquitous in systems. In particular, errors reasoning verification must be considered regarding safety-critical We present a method that can applied to systems described by the polynomial error assertion (PEA). The implication relationship between PEAs converted an inclusion zero sets of PEAs; then transformed into first-order logic. Combined with quantifier elimination ...