Pith Number

pith:7H67VBFW

pith:2013:7H67VBFWHFPT4KLVVAUIRYJJPL

not attested not anchored not stored refs pending

Odd order Brauer--Manin obstruction on diagonal quartic surfaces

Alexei N. Skorobogatov, Evis Ieronymou

arxiv:1312.6255 v1 · 2013-12-21 · math.NT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7H67VBFWHFPT4KLVVAUIRYJJPL}

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	2026-05-18T03:04:05.716679Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f9fdfa84b6395f3e2975a82888e1297ae1e4d2329c62d774fedd98b460d850d6

Aliases

arxiv: 1312.6255 · arxiv_version: 1312.6255v1 · doi: 10.48550/arxiv.1312.6255 · pith_short_12: 7H67VBFWHFPT · pith_short_16: 7H67VBFWHFPT4KLV · pith_short_8: 7H67VBFW

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/7H67VBFWHFPT4KLVVAUIRYJJPL \
  | 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: f9fdfa84b6395f3e2975a82888e1297ae1e4d2329c62d774fedd98b460d850d6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "94ea459eb5180dc9043a70e11155c1ab433489c7f69f2f863ed08b9875de9fba",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NT",
    "submitted_at": "2013-12-21T14:16:59Z",
    "title_canon_sha256": "8accb6f2ec0ca5965d56c414a20eb7c484a472cebb7b877a7baa5cf8232ce4ec"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.6255",
    "kind": "arxiv",
    "version": 1
  }
}