Pith Number

pith:PDXCFJKB

pith:2025:PDXCFJKBZOJZIW4LSAZAPIJ2JD

not attested not anchored not stored refs pending

Seshadri constants and negative curves on blowups of ruled surfaces

Bivas Khan, Cyril J. Jacob, Ronnie Sebastian

arxiv:2501.05065 v1 · 2025-01-09 · 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{PDXCFJKBZOJZIW4LSAZAPIJ2JD}

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	2026-07-05T09:59:03.832465Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

78ee22a541cb93945b8b903207a13a48c3c307a0ff5672aec9fccd879ec81da0

Aliases

arxiv: 2501.05065 · arxiv_version: 2501.05065v1 · doi: 10.48550/arxiv.2501.05065 · pith_short_12: PDXCFJKBZOJZ · pith_short_16: PDXCFJKBZOJZIW4L · pith_short_8: PDXCFJKB

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/PDXCFJKBZOJZIW4LSAZAPIJ2JD \
  | 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: 78ee22a541cb93945b8b903207a13a48c3c307a0ff5672aec9fccd879ec81da0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9b40f7e7342fe7bf767c20e7e782daa07da41ef58a8c8149242e4c0ea7f9ae47",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2025-01-09T08:43:06Z",
    "title_canon_sha256": "c792ab7d5f60680feecf6e485576c470b27baaeace48848f66ff5941cab2a660"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2501.05065",
    "kind": "arxiv",
    "version": 1
  }
}