Pith Number

pith:YRNF4SBT

pith:2025:YRNF4SBTBVIDLZEV5YECL2Q7XB

not attested not anchored not stored refs pending

Obstruction Theory for Bigraded Differential Algebras

Jiahao Hu

arxiv:2504.06590 v3 · 2025-04-09 · math.AT · math.AC · math.DG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YRNF4SBTBVIDLZEV5YECL2Q7XB}

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	2026-05-28T02:04:40.416524Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c45a5e48330d5035e495ee0825ea1fb863a641ad2e53ac91ed24c1ebc1678f55

Aliases

arxiv: 2504.06590 · arxiv_version: 2504.06590v3 · doi: 10.48550/arxiv.2504.06590 · pith_short_12: YRNF4SBTBVID · pith_short_16: YRNF4SBTBVIDLZEV · pith_short_8: YRNF4SBT

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/YRNF4SBTBVIDLZEV5YECL2Q7XB \
  | 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: c45a5e48330d5035e495ee0825ea1fb863a641ad2e53ac91ed24c1ebc1678f55

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b42992fb89b350329439cfab7cfbb198aac4243df90b2d52d811a43a8da9aab7",
    "cross_cats_sorted": [
      "math.AC",
      "math.DG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2025-04-09T05:35:50Z",
    "title_canon_sha256": "1a77a16b7ce95bfced0d386a2aa00c2c7ed0e8ad21d77502b9e6d3221af940f4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2504.06590",
    "kind": "arxiv",
    "version": 3
  }
}