Pith Number

pith:7BAAM7JE

pith:2014:7BAAM7JETAQBLB4UB25MPO2ZJS

not attested not anchored not stored refs pending

Rigidity of Almost-Isometric Universal Covers

Aditi Kar, Benjamin Schmidt, Jean-Francois Lafont

arxiv:1409.3064 v1 · 2014-09-10 · math.GR · math.DG · 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{7BAAM7JETAQBLB4UB25MPO2ZJS}

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	2026-05-18T01:11:00.407211Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f840067d2498201587940ebac7bb594c99723127fad51e662d7c8c8ae440de1d

Aliases

arxiv: 1409.3064 · arxiv_version: 1409.3064v1 · doi: 10.48550/arxiv.1409.3064 · pith_short_12: 7BAAM7JETAQB · pith_short_16: 7BAAM7JETAQBLB4U · pith_short_8: 7BAAM7JE

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/7BAAM7JETAQBLB4UB25MPO2ZJS \
  | 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: f840067d2498201587940ebac7bb594c99723127fad51e662d7c8c8ae440de1d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2b33bcdedb114212ff02bf0ad23b2701e308a84dabfcfdcb565ba537deb00671",
    "cross_cats_sorted": [
      "math.DG",
      "math.GT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2014-09-10T13:40:08Z",
    "title_canon_sha256": "ba356a96dea32df92f4b192e201f4c31d3b45fbd201038a47e2f7220cb6be598"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1409.3064",
    "kind": "arxiv",
    "version": 1
  }
}