Line 1,923: |
Line 1,923: |
| ==Note 23== | | ==Note 23== |
| | | |
− | <pre>
| + | Given but a single free square on the tape, there are just two different sets of initial conditions for <math>\operatorname{Stunt}(2),</math> the finite approximation to the parity turing machine that we are presently considering. |
− | Given but a single free square on the tape, there are just | |
− | two different sets of initial conditions for Stunt(2), the | |
− | finite approximation to the parity turing machine that we | |
− | are presently considering. | |
− | | |
− | Initial Conditions for Tape Input "0"
| |
− | | |
− | The following conjunction of 5 basic propositions
| |
− | describes the initial conditions when Stunt(2) is
| |
− | started with an input of "0" in its free square:
| |
| | | |
− | p0_q0
| + | ===Initial Conditions for Tape Input "0"=== |
| | | |
− | p0_r1
| + | The following conjunction of 5 basic propositions describes the initial conditions when <math>\operatorname{Stunt}(2)</math> is started with an input of "0" in its free square: |
| | | |
− | p0_r0_s#
| + | {| align="center" cellpadding="8" width="90%" |
− | p0_r1_s0
| + | | |
− | p0_r2_s#
| + | <math>\begin{array}{l} |
| + | \texttt{p0\_q0} |
| + | \\ \\ |
| + | \texttt{p0\_r1} |
| + | \\ \\ |
| + | \texttt{p0\_r0\_s\#} |
| + | \\ |
| + | \texttt{p0\_r1\_s0} |
| + | \\ |
| + | \texttt{p0\_r2\_s\#} |
| + | \end{array}</math> |
| + | |} |
| | | |
| This conjunction of basic propositions may be read as follows: | | This conjunction of basic propositions may be read as follows: |
| | | |
| + | <pre> |
| At time p_0, M is in the state q_0, and | | At time p_0, M is in the state q_0, and |
| At time p_0, H is reading cell r_1, and | | At time p_0, H is reading cell r_1, and |
Line 1,950: |
Line 1,952: |
| At time p_0, cell r_1 contains "0", and | | At time p_0, cell r_1 contains "0", and |
| At time p_0, cell r_2 contains "#". | | At time p_0, cell r_2 contains "#". |
| + | </pre> |
| | | |
− | Initial Conditions for Tape Input "1" | + | ===Initial Conditions for Tape Input "1"=== |
| | | |
− | The following conjunction of 5 basic propositions | + | The following conjunction of 5 basic propositions describes the initial conditions when <math>\operatorname{Stunt}(2)</math> is started with an input of "1" in its free square: |
− | describes the initial conditions when Stunt(2) is | |
− | started with an input of "1" in its free square: | |
| | | |
− | p0_q0
| + | {| align="center" cellpadding="8" width="90%" |
− | | + | | |
− | p0_r1
| + | <math>\begin{array}{l} |
− | | + | \texttt{p0\_q0} |
− | p0_r0_s#
| + | \\ \\ |
− | p0_r1_s1
| + | \texttt{p0\_r1} |
− | p0_r2_s#
| + | \\ \\ |
| + | \texttt{p0\_r0\_s\#} |
| + | \\ |
| + | \texttt{p0\_r1\_s1} |
| + | \\ |
| + | \texttt{p0\_r2\_s\#} |
| + | \end{array}</math> |
| + | |} |
| | | |
| This conjunction of basic propositions may be read as follows: | | This conjunction of basic propositions may be read as follows: |
| | | |
| + | <pre> |
| At time p_0, M is in the state q_0, and | | At time p_0, M is in the state q_0, and |
| At time p_0, H is reading cell r_1, and | | At time p_0, H is reading cell r_1, and |