Pith Number

pith:UB4JKENC

pith:2017:UB4JKENCK45OGO3KDEMCI2L7VV

not attested not anchored not stored refs pending

Positivity of divisors on blown-up projective spaces, II

Elisa Postinghel, Olivia Dumitrescu

arxiv:1709.05012 v3 · 2017-09-15 · 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{UB4JKENCK45OGO3KDEMCI2L7VV}

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	2026-05-17T23:49:22.718682Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a0789511a2573ae33b6a191824697fad61e35922e9218b77141d0adb70ebe6af

Aliases

arxiv: 1709.05012 · arxiv_version: 1709.05012v3 · doi: 10.48550/arxiv.1709.05012 · pith_short_12: UB4JKENCK45O · pith_short_16: UB4JKENCK45OGO3K · pith_short_8: UB4JKENC

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/UB4JKENCK45OGO3KDEMCI2L7VV \
  | 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: a0789511a2573ae33b6a191824697fad61e35922e9218b77141d0adb70ebe6af

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "34f24acd58e625b68495717bd60b45a4ec7594ee57ff7ec17b10ee28ff55a1ad",
    "cross_cats_sorted": [
      "math.AC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2017-09-15T00:05:31Z",
    "title_canon_sha256": "2c9c5c09f4c2a858adf8ea2cf2b8c04ee14b169320e1996cae3dcbb90353549a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1709.05012",
    "kind": "arxiv",
    "version": 3
  }
}