Pith Number

pith:EVDN42AL

pith:2013:EVDN42ALH47K3XE4OS2SOBFWNY

not attested not anchored not stored refs pending

Nielsen coincidence theory of fibre-preserving maps and Dold's fixed point index

Daciberg L. Gon\c{c}alves, Ulrich Koschorke

arxiv:1305.1650 v1 · 2013-05-07 · math.AT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EVDN42ALH47K3XE4OS2SOBFWNY}

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	2026-05-18T03:26:11.717162Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2546de680b3f3eaddc9c74b52704b66e2df63dac981922f4b1b7719b748f678d

Aliases

arxiv: 1305.1650 · arxiv_version: 1305.1650v1 · doi: 10.48550/arxiv.1305.1650 · pith_short_12: EVDN42ALH47K · pith_short_16: EVDN42ALH47K3XE4 · pith_short_8: EVDN42AL

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/EVDN42ALH47K3XE4OS2SOBFWNY \
  | 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: 2546de680b3f3eaddc9c74b52704b66e2df63dac981922f4b1b7719b748f678d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "810cebf2df11675cd2740fa2525d05e867043f8a26d597f2f0df74fad6a52a13",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2013-05-07T21:22:59Z",
    "title_canon_sha256": "c317e8ed5dc3217f9cfd7122b8fa2b8a0719f636954eafc45d9800e25a84251e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.1650",
    "kind": "arxiv",
    "version": 1
  }
}