Pith Number

pith:DO4N6U2G

pith:2014:DO4N6U2GXKK6LLDWRWY2IXEC7I

not attested not anchored not stored refs pending

Representability of cohomological functors over extension fields

Alice Rizzardo

arxiv:1402.4505 v1 · 2014-02-18 · math.AG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DO4N6U2GXKK6LLDWRWY2IXEC7I}

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	2026-05-18T02:58:34.045328Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1bb8df5346ba95e5ac768db1a45c82fa3474abf5ab833c92ff1c6c079dea94fa

Aliases

arxiv: 1402.4505 · arxiv_version: 1402.4505v1 · doi: 10.48550/arxiv.1402.4505 · pith_short_12: DO4N6U2GXKK6 · pith_short_16: DO4N6U2GXKK6LLDW · pith_short_8: DO4N6U2G

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/DO4N6U2GXKK6LLDWRWY2IXEC7I \
  | 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: 1bb8df5346ba95e5ac768db1a45c82fa3474abf5ab833c92ff1c6c079dea94fa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bcdc6f8078422d5486e4602f1932595bbdc97ef1b87ce282393c057b3151c9ae",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2014-02-18T21:50:22Z",
    "title_canon_sha256": "93445a49ff2f70aba0a423451a951cbfe4952f4f833a2fc9ec463e2534e68c55"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1402.4505",
    "kind": "arxiv",
    "version": 1
  }
}