Pith Number

pith:PAZIPZCM

pith:2017:PAZIPZCMV4RL3K6CLYOWBSBY3U

not attested not anchored not stored refs pending

Positivity of anticanonical divisors from the viewpoint of Fano conic bundles

Eleonora Anna Romano

arxiv:1703.02953 v1 · 2017-03-08 · 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{PAZIPZCMV4RL3K6CLYOWBSBY3U}

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	2026-05-18T00:49:05.224512Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

783287e44caf22bdabc25e1d60c838dd399cfd100d66291535c357207b55f6d9

Aliases

arxiv: 1703.02953 · arxiv_version: 1703.02953v1 · doi: 10.48550/arxiv.1703.02953 · pith_short_12: PAZIPZCMV4RL · pith_short_16: PAZIPZCMV4RL3K6C · pith_short_8: PAZIPZCM

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/PAZIPZCMV4RL3K6CLYOWBSBY3U \
  | 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: 783287e44caf22bdabc25e1d60c838dd399cfd100d66291535c357207b55f6d9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8c7415fd616b35ba7976363307b1ea0204d5cbc553a5c8cc2baae2be3fff0a65",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2017-03-08T18:23:25Z",
    "title_canon_sha256": "4cff1b1d259a292dc211d9cd85a39f52867be9ffaaa88e51fc65afc6e0fabc56"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1703.02953",
    "kind": "arxiv",
    "version": 1
  }
}