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Distinguish final injection from final result availability.
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Use N=3, K=5 with the course's registered, unstalled model. E0 is the first data edge after initialization. The final term has k=4 and i=j=2.
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Which edge injects the final boundary operands, and how many drain edges follow?
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Final boundary injection is E6. The grid finishes after E8, so E7 and E8 are two drain edges. Computation uses nine advance edges E0..E8.
What are the final edge number and total compute-edge count?
The final term arrives on k+i+j=4+2+2=8. Counting E0 inclusively gives nine edges; separate output transfer is excluded.
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