Previous figure shaded all of B in red, making it look like X
and Y were the same red region. New version distinguishes:
- X (annulus between H_d and H_{d-1}) = light cyan.
- Y (exterior of H_{d-1}) = light yellow.
- A (inside H_d) = white.
- B (low-side face of H_d) = everything outside red dashed
boundary = cyan ∪ yellow.
Now visually clear:
- X is the cyan annulus (proper subset of B).
- Y is the yellow exterior (proper subset of B).
- B = X ∪ Y, neither X nor Y contains all of B.
The two arrows from "face B" label point at both regions to
emphasize B spans both faces of H_{d-1}.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
didericis
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