Pith Number

pith:W5EQUH2L

pith:2018:W5EQUH2LJHGK2VIPXJUSPSFGNQ

not attested not anchored not stored refs pending

The Classification Problem for 2-Forms in Four Variables

Jaime Mu\~noz Masqu\'e, Luis Miguel Pozo Coronado

arxiv:1802.03196 v1 · 2018-02-09 · math.DG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{W5EQUH2LJHGK2VIPXJUSPSFGNQ}

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	2026-05-18T00:23:58.338156Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b7490a1f4b49ccad550fba6927c8a66c0f56e9fed307429ba24cca81a8da7b6d

Aliases

arxiv: 1802.03196 · arxiv_version: 1802.03196v1 · doi: 10.48550/arxiv.1802.03196 · pith_short_12: W5EQUH2LJHGK · pith_short_16: W5EQUH2LJHGK2VIP · pith_short_8: W5EQUH2L

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/W5EQUH2LJHGK2VIPXJUSPSFGNQ \
  | 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: b7490a1f4b49ccad550fba6927c8a66c0f56e9fed307429ba24cca81a8da7b6d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ab99bb0628d0c67a309f070468ce71cbcc1d96eb9f166f517019810a3883e2d3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2018-02-09T10:37:42Z",
    "title_canon_sha256": "e66cadac0e07a0711d46367f9807a5e344de62fd75a82d94f0f9c263babcf541"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.03196",
    "kind": "arxiv",
    "version": 1
  }
}