MORE EXAMPLES OF DIRECT DERIVATIONS

All the following use the same set of rules you met with in your first page on derivations.

1. PQORC
2. P \ show R
3. PQO.....2 O int
4. R.........1,3 C elim

1. PRC
2. QRNA \ show PN
3. RN............2 A elim
4. RNPNC......1 C subs
5. PN.............3,4 C elim
1. QPORC
2. SPA \ show RNTNC
3. P.............2 A elim
4. QPO.........3 O int
5. R.............1,4 C elim
6. RTNO......5 O int
7. RNTNC.....6 CO subs

In these examples note that the order of the elements does not matter in the use of rules for introducing or eliminating the signals A and O. The left-to-right order does matter for the rules with the signal C.

It is also helpful to remember that by using the rules O int and CO subs it is often possible to derive strings ending in O or C which otherwise seem unavailable through a direct derivation.

Go on to additional rules and examples.

Go back to the starting page.