Pith Number

pith:44JKU4EZ

pith:2016:44JKU4EZMGOHA5POTIZPYLP7AI

not attested not anchored not stored refs pending

Geometric-optical illusions and Riemannian geometry

Jiri Wackermann, Werner Ehm

arxiv:1610.02227 v1 · 2016-10-07 · q-bio.NC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{44JKU4EZMGOHA5POTIZPYLP7AI}

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	2026-05-18T01:02:58.014111Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e712aa7099619c7075ee9a32fc2dff02043c74cb9731962912e91d72d67ac279

Aliases

arxiv: 1610.02227 · arxiv_version: 1610.02227v1 · doi: 10.48550/arxiv.1610.02227 · pith_short_12: 44JKU4EZMGOH · pith_short_16: 44JKU4EZMGOHA5PO · pith_short_8: 44JKU4EZ

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/44JKU4EZMGOHA5POTIZPYLP7AI \
  | 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: e712aa7099619c7075ee9a32fc2dff02043c74cb9731962912e91d72d67ac279

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b4c785c0b0d27a1586f013f81666bc445268ed57aacd65c331a72f33c23c82e3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.NC",
    "submitted_at": "2016-10-07T11:08:48Z",
    "title_canon_sha256": "8d58008ccb859a3cd937577c9ff75bc03209e9397b3526bf2abe0150309a6ec8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1610.02227",
    "kind": "arxiv",
    "version": 1
  }
}