Pith Number

pith:USFPLDWK

pith:2013:USFPLDWK7NH2Z7LZ57ZB4LF6CJ

not attested not anchored not stored refs pending

An effective criterion for algebraic contractibility of rational curves

Pinaki Mondal

arxiv:1301.0126 v1 · 2013-01-01 · 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{USFPLDWK7NH2Z7LZ57ZB4LF6CJ}

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	2026-05-18T03:37:28.138549Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a48af58ecafb4facfd79eff21e2cbe127420479d6a1caa3ab77899892e8068c1

Aliases

arxiv: 1301.0126 · arxiv_version: 1301.0126v1 · doi: 10.48550/arxiv.1301.0126 · pith_short_12: USFPLDWK7NH2 · pith_short_16: USFPLDWK7NH2Z7LZ · pith_short_8: USFPLDWK

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/USFPLDWK7NH2Z7LZ57ZB4LF6CJ \
  | 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: a48af58ecafb4facfd79eff21e2cbe127420479d6a1caa3ab77899892e8068c1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "43f86fe98fd9d7265e0d1e9eb693878e65413536f54ee6e6c10bc302827a3cc1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2013-01-01T19:49:40Z",
    "title_canon_sha256": "ef5f0fca0479e4625db604b77019051800fa52fc4aa0a77937f653a42256132e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.0126",
    "kind": "arxiv",
    "version": 1
  }
}