Pith Number

pith:NQZP4VBW

pith:2016:NQZP4VBW5SLPK4UAMPQUDCPCZP

not attested not anchored not stored refs pending

Projectively invariant objects and the index of the group of affine transformations in the group of projective transformations

Vladimir S. Matveev

arxiv:1604.01238 v2 · 2016-04-05 · math.DG · nlin.SI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NQZP4VBW5SLPK4UAMPQUDCPCZP}

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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.

Cited by

1 paper in Pith

The Diffeomorphism Field

Receipt and verification

First computed	2026-07-05T02:46:39.014602Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6c32fe5436ec96f5728063e14189e2cbfd76b0bef5d15da846f6dece7542be38

Aliases

arxiv: 1604.01238 · arxiv_version: 1604.01238v2 · doi: 10.48550/arxiv.1604.01238 · pith_short_12: NQZP4VBW5SLP · pith_short_16: NQZP4VBW5SLPK4UA · pith_short_8: NQZP4VBW

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/NQZP4VBW5SLPK4UAMPQUDCPCZP \
  | 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: 6c32fe5436ec96f5728063e14189e2cbfd76b0bef5d15da846f6dece7542be38

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6f7fc604dfba928282ef095a65fc641dc190fac711b593cd02cde8d0139c5ce8",
    "cross_cats_sorted": [
      "nlin.SI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2016-04-05T12:51:45Z",
    "title_canon_sha256": "773a39882e9685e364f69ede6a7689ab391ef45a2fdc2a78d63a16290ec5aaa3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1604.01238",
    "kind": "arxiv",
    "version": 2
  }
}