Pith Number

pith:UDJLGTTQ

pith:2010:UDJLGTTQXV277QHDN3KYTF5V3O

not attested not anchored not stored refs pending

Diffeomorphisms of pseudo-Riemannian manifolds and the values of the curvature tensor on degenerate planes

Ognian Kassabov

arxiv:1008.5076 v1 · 2010-08-30 · 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{UDJLGTTQXV277QHDN3KYTF5V3O}

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	2026-05-18T04:41:37.185261Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a0d2b34e70bd75ffc0e36ed58997b5db960c9174b4fdeb7a0d62e1d70d22f00b

Aliases

arxiv: 1008.5076 · arxiv_version: 1008.5076v1 · doi: 10.48550/arxiv.1008.5076 · pith_short_12: UDJLGTTQXV27 · pith_short_16: UDJLGTTQXV277QHD · pith_short_8: UDJLGTTQ

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/UDJLGTTQXV277QHDN3KYTF5V3O \
  | 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: a0d2b34e70bd75ffc0e36ed58997b5db960c9174b4fdeb7a0d62e1d70d22f00b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4f750337efc4dc925e65e437664c3fc5578a20afa0811cc6449850a405a535c7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2010-08-30T13:15:11Z",
    "title_canon_sha256": "51efbf84a9ae58a7c1d70c705c578f30fed764ded312055a71efd35f48ed22a1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1008.5076",
    "kind": "arxiv",
    "version": 1
  }
}