Changes

Line 2,429: Line 2,429:  
A propositional expression of this form can be read as follows:
 
A propositional expression of this form can be read as follows:
   −
<pre>
+
{| align="center" cellpadding="8" width="90%"
  IF:
+
|<math>\operatorname{If}</math>
 +
|-
 +
| At the time <math>p_i,\!</math> the tape cell <math>r_j\!</math> bears the mark <math>s_k,\!</math>
 +
|-
 +
| <math>\operatorname{But}</math> it is not the case that:
 +
|-
 +
| At the time <math>p_i,\!</math> the tape head is on the tape cell <math>r_j,\!</math>
 +
|-
 +
| <math>\operatorname{Then}</math>
 +
|-
 +
| At the time <math>p_{i+1},\!</math> the tape cell <math>r_j\!</math> bears the mark <math>s_k.\!</math>
 +
|}
   −
  At the time p<i>, the tape cell r<j> bears the mark s<k>,
+
The eighteen clauses of the Interaction Conditions simply impose one such constraint on symbol changes for each combination of the times <math>p_0, p_1,\!</math> registers <math>r_0, r_1, r_2,\!</math> and symbols <math>s_0, s_1, s_\#.\!</math>
 
  −
  BUT it is NOT the case that:
  −
 
  −
  At the time p<i>, the tape head is on the tape cell r<j>,
  −
 
  −
  THEN:
  −
 
  −
  At the time p<i+1>, the tape cell r<j> bears the mark s<k>.
  −
</pre>
  −
 
  −
The eighteen clauses of the Interaction Conditions simply impose one such constraint on symbol changes for each combination of the times <math>p_0, p_1,\!</math> registers <math>r_0, r_1, r_2,</math> and symbols <math>s_0, s_1, s_\#.\!</math>
      
===Transition Relations===
 
===Transition Relations===
12,080

edits