Pith Number

pith:BHX6RQ44

pith:2014:BHX6RQ44RUBIA5YE44J6RN76O7

not attested not anchored not stored refs pending

On the universal family of Hilbert schemes of points on a surface

Lei Song

arxiv:1407.5490 v2 · 2014-07-21 · 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{BHX6RQ44RUBIA5YE44J6RN76O7}

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	2026-05-18T01:32:10.842587Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

09efe8c39c8d02807704e713e8b7fe77fab227234c986d38a9894e6e92c4e762

Aliases

arxiv: 1407.5490 · arxiv_version: 1407.5490v2 · doi: 10.48550/arxiv.1407.5490 · pith_short_12: BHX6RQ44RUBI · pith_short_16: BHX6RQ44RUBIA5YE · pith_short_8: BHX6RQ44

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/BHX6RQ44RUBIA5YE44J6RN76O7 \
  | 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: 09efe8c39c8d02807704e713e8b7fe77fab227234c986d38a9894e6e92c4e762

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f79cc2cc80912dd82b8cc5fead45177eac457fdd6b46a5199aac259d10d6e6e4",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2014-07-21T13:39:00Z",
    "title_canon_sha256": "d88fe2f0400efd434542c716e40ef74d399bebe313a9fe18df3af725084495c9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1407.5490",
    "kind": "arxiv",
    "version": 2
  }
}