Pith Number

pith:FKBV64MN

pith:2017:FKBV64MNLRDCKV2G6GX2T3WV4P

not attested not anchored not stored refs pending

On the third homotopy group of Orr's space

Emmanuel D. Farjoun, Roman Mikhailov

arxiv:1703.10537 v1 · 2017-03-30 · math.AT · math.GT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FKBV64MNLRDCKV2G6GX2T3WV4P}

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	2026-05-18T00:20:56.553340Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2a835f718d5c46255746f1afa9eed5e3e0d76f0e9b308e9633357d02de129e74

Aliases

arxiv: 1703.10537 · arxiv_version: 1703.10537v1 · doi: 10.48550/arxiv.1703.10537 · pith_short_12: FKBV64MNLRDC · pith_short_16: FKBV64MNLRDCKV2G · pith_short_8: FKBV64MN

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/FKBV64MNLRDCKV2G6GX2T3WV4P \
  | 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: 2a835f718d5c46255746f1afa9eed5e3e0d76f0e9b308e9633357d02de129e74

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "93f9278b48e01f15175a8fc6db0c412624c6d13f052de857d3e01c529fd5135c",
    "cross_cats_sorted": [
      "math.GT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2017-03-30T15:43:49Z",
    "title_canon_sha256": "4635f16ce486becec24a34e4384b255401a92448bd82126b477e1235bd082d3d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1703.10537",
    "kind": "arxiv",
    "version": 1
  }
}