Pith Number

pith:FWH6YYDW

pith:2015:FWH6YYDW7GLS7TWMS7HCVYA4YT

not attested not anchored not stored refs pending

Positivity of divisors on blown-up projective spaces, I

Elisa Postinghel, Olivia Dumitrescu

arxiv:1506.04726 v5 · 2015-06-15 · math.AG · math.AC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FWH6YYDW7GLS7TWMS7HCVYA4YT}

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	2026-05-18T00:35:09.622258Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2d8fec6076f9972fcecc97ce2ae01cc4d94e0b17eb80815c93a4b3a7045f170f

Aliases

arxiv: 1506.04726 · arxiv_version: 1506.04726v5 · doi: 10.48550/arxiv.1506.04726 · pith_short_12: FWH6YYDW7GLS · pith_short_16: FWH6YYDW7GLS7TWM · pith_short_8: FWH6YYDW

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/FWH6YYDW7GLS7TWMS7HCVYA4YT \
  | 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: 2d8fec6076f9972fcecc97ce2ae01cc4d94e0b17eb80815c93a4b3a7045f170f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e06b70fc124fbd050e45fff7acb7e547d705f8000e8e518d48edbc55c1c26ea7",
    "cross_cats_sorted": [
      "math.AC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2015-06-15T19:44:32Z",
    "title_canon_sha256": "8104acd449b13bf4498b3c5f07aa6968ec60452ce43f7c4efe461b5e06035843"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1506.04726",
    "kind": "arxiv",
    "version": 5
  }
}