Pith Number

pith:PFMQERVZ

pith:2017:PFMQERVZQJKXLZLLZF6SQPAKLS

not attested not anchored not stored refs pending

A Numerical Algorithm for C2-splines on Symmetric Spaces

Geir Bogfjellmo, Klas Modin, Olivier Verdier

arxiv:1703.09589 v2 · 2017-03-28 · math.NA · 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{PFMQERVZQJKXLZLLZF6SQPAKLS}

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	2026-05-18T00:04:24.134669Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

79590246b9825575e56bc97d283c0a5ca46be155d9537ee386a21d24d1a07ec2

Aliases

arxiv: 1703.09589 · arxiv_version: 1703.09589v2 · doi: 10.48550/arxiv.1703.09589 · pith_short_12: PFMQERVZQJKX · pith_short_16: PFMQERVZQJKXLZLL · pith_short_8: PFMQERVZ

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/PFMQERVZQJKXLZLLZF6SQPAKLS \
  | 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: 79590246b9825575e56bc97d283c0a5ca46be155d9537ee386a21d24d1a07ec2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "26eabbe42cb327dc9110595dadd52575b98b104b26f67814146f1e8c7f677204",
    "cross_cats_sorted": [
      "math.DG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2017-03-28T14:14:19Z",
    "title_canon_sha256": "ddceaed7271a3377adc5a9c72692ec12dc8764b9ad96ba55662e44d29327e9f9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1703.09589",
    "kind": "arxiv",
    "version": 2
  }
}