Pith Number

pith:7Y3AGKVB

pith:2026:7Y3AGKVBPXPRHNERG2XEWC33AM

not attested not anchored not stored refs pending

When a positive SIMP density floor is not enough: solver admissibility and guarded floor selection in matrix-free 3D topology optimization

Jun Wang, Shaoliang Yang, Yunsheng Wang

arxiv:2607.26382 v1 · 2026-07-29 · cs.CE · cs.NA · math.NA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7Y3AGKVBPXPRHNERG2XEWC33AM}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-30T01:18:15.652440Z
Builder	pith-number-builder-2026-05-17-v1
Signature	unsigned_v0
Schema	pith-number/v1.0

Canonical hash

fe36032aa17ddf13b49136ae4b0b7b03330ab6e712fb862691ef653d1e910d96

Aliases

arxiv: 2607.26382 · arxiv_version: 2607.26382v1 · doi: 10.48550/arxiv.2607.26382 · pith_short_12: 7Y3AGKVBPXPR · pith_short_16: 7Y3AGKVBPXPRHNER · pith_short_8: 7Y3AGKVB

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/7Y3AGKVBPXPRHNERG2XEWC33AM \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: fe36032aa17ddf13b49136ae4b0b7b03330ab6e712fb862691ef653d1e910d96

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6baf6568def160137edcd4d8864b3fc63b3c92766d2b5820d349ef89bc486c42",
    "cross_cats_sorted": [
      "cs.NA",
      "math.NA"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "cs.CE",
    "submitted_at": "2026-07-29T01:35:42Z",
    "title_canon_sha256": "33cd22347b4cd0d81cd21d2d1c0d1ed3cfb344b47f47c9b2aba80da44798bacd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.26382",
    "kind": "arxiv",
    "version": 1
  }
}