Pith Number

pith:7EHRHNMW

pith:2019:7EHRHNMWWEMHTY4GGAFEPNGLZ5

not attested not anchored not stored refs pending

The Integral Chow Ring of $\bar{M}_2$

Eric Larson

arxiv:1904.08081 v1 · 2019-04-17 · 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{7EHRHNMWWEMHTY4GGAFEPNGLZ5}

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	2026-05-17T23:48:18.830496Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f90f13b596b11879e386300a47b4cbcf651acbc04b2d968c6a01dcf7372be8bb

Aliases

arxiv: 1904.08081 · arxiv_version: 1904.08081v1 · doi: 10.48550/arxiv.1904.08081 · pith_short_12: 7EHRHNMWWEMH · pith_short_16: 7EHRHNMWWEMHTY4G · pith_short_8: 7EHRHNMW

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/7EHRHNMWWEMHTY4GGAFEPNGLZ5 \
  | 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: f90f13b596b11879e386300a47b4cbcf651acbc04b2d968c6a01dcf7372be8bb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "220b7b5e32267d278497b43b1ac15e40b0f2498cc0a78d20fb865851615f15a3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2019-04-17T04:59:52Z",
    "title_canon_sha256": "36d9e245d4b67263081c202aac9b6536e00eb3acc192b2e4fae025a3ef2d063a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.08081",
    "kind": "arxiv",
    "version": 1
  }
}