Pith Number

pith:XCXPGM56

pith:2013:XCXPGM565LOJBROY2L4PFAMF54

not attested not anchored not stored refs pending

Stable cohomology of spaces of non-singular hypersurfaces

Orsola Tommasi

arxiv:1311.2497 v3 · 2013-11-11 · math.AG · math.AT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XCXPGM565LOJBROY2L4PFAMF54}

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	2026-05-18T02:45:39.544965Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b8aef333beeadc90c5d8d2f8f28185ef1cec4652822ea5041ba0116d63d23aa9

Aliases

arxiv: 1311.2497 · arxiv_version: 1311.2497v3 · doi: 10.48550/arxiv.1311.2497 · pith_short_12: XCXPGM565LOJ · pith_short_16: XCXPGM565LOJBROY · pith_short_8: XCXPGM56

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/XCXPGM565LOJBROY2L4PFAMF54 \
  | 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: b8aef333beeadc90c5d8d2f8f28185ef1cec4652822ea5041ba0116d63d23aa9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a6477ff7e7646438474c64a8383b910433f68b48bf4bb74823763fc92ed11b94",
    "cross_cats_sorted": [
      "math.AT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2013-11-11T16:49:31Z",
    "title_canon_sha256": "2efd579c024e86f81cbbe4e8ecd39f68d7ba7547dfc8f2dc0bd90c721341e0d2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1311.2497",
    "kind": "arxiv",
    "version": 3
  }
}