Pith Number

pith:XHWMAFYE

pith:2016:XHWMAFYEQ2Z6PUHHV5PLEW74KT

not attested not anchored not stored refs pending

Centro-affine invariants and the canonical Lorentz metric on the space of centered ellipses

Marcos Salvai

arxiv:1611.02347 v1 · 2016-11-08 · 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{XHWMAFYEQ2Z6PUHHV5PLEW74KT}

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	2026-05-18T00:59:52.340776Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b9ecc0170486b3e7d0e7af5eb25bfc54cfe73544a95e2fc2469f99dbf7fff14a

Aliases

arxiv: 1611.02347 · arxiv_version: 1611.02347v1 · doi: 10.48550/arxiv.1611.02347 · pith_short_12: XHWMAFYEQ2Z6 · pith_short_16: XHWMAFYEQ2Z6PUHH · pith_short_8: XHWMAFYE

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/XHWMAFYEQ2Z6PUHHV5PLEW74KT \
  | 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: b9ecc0170486b3e7d0e7af5eb25bfc54cfe73544a95e2fc2469f99dbf7fff14a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2213e50d46ec666f910aa2194a3483f0b0477a8007f2004896134510234f83ea",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2016-11-08T00:12:04Z",
    "title_canon_sha256": "65bcf73f2eb04d824de59eed28ddc24653fac23751eec3b809996c73d0d6587d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1611.02347",
    "kind": "arxiv",
    "version": 1
  }
}