Pith Number

pith:7EFTNZSJ

pith:2017:7EFTNZSJSEBYNANEDXB6G4PJTH

not attested not anchored not stored refs pending

On the Falk invariant of signed graphic arrangements

Michele Torielli, Weili Guo

arxiv:1703.09402 v1 · 2017-03-28 · math.AG · math.CO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7EFTNZSJSEBYNANEDXB6G4PJTH}

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	2026-05-18T00:47:44.674575Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f90b36e64991038681a41dc3e371e999eef2647e8ba9a351d8a0dbc460249228

Aliases

arxiv: 1703.09402 · arxiv_version: 1703.09402v1 · doi: 10.48550/arxiv.1703.09402 · pith_short_12: 7EFTNZSJSEBY · pith_short_16: 7EFTNZSJSEBYNANE · pith_short_8: 7EFTNZSJ

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/7EFTNZSJSEBYNANEDXB6G4PJTH \
  | 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: f90b36e64991038681a41dc3e371e999eef2647e8ba9a351d8a0dbc460249228

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "73b51295e1e89b733fde6c4fa48473cbac3b34d42945ea4dab487bb4118d5bac",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2017-03-28T05:12:18Z",
    "title_canon_sha256": "65ccfe0105ce8ec5aaeea7c9b8eb7ac7cb65d8f12ef47d6d9c5ad7fa45d6747a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1703.09402",
    "kind": "arxiv",
    "version": 1
  }
}