Pith Number

pith:FQEJ55MQ

pith:2015:FQEJ55MQZSW2L5JL5SPVA7MJJ6

not attested not anchored not stored refs pending

Every Infinite order mapping class has an infinite order action on the homology of some finite cover

Asaf Hadari

arxiv:1508.01555 v1 · 2015-08-06 · 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{FQEJ55MQZSW2L5JL5SPVA7MJJ6}

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	2026-05-18T01:35:39.425609Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2c089ef590ccada5f52bec9f507d894f8895c07a305227f84cd97ee31b828001

Aliases

arxiv: 1508.01555 · arxiv_version: 1508.01555v1 · doi: 10.48550/arxiv.1508.01555 · pith_short_12: FQEJ55MQZSW2 · pith_short_16: FQEJ55MQZSW2L5JL · pith_short_8: FQEJ55MQ

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/FQEJ55MQZSW2L5JL5SPVA7MJJ6 \
  | 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: 2c089ef590ccada5f52bec9f507d894f8895c07a305227f84cd97ee31b828001

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d432fec5640035106d5f1306debe2ca68aff5697f456ed2dd098afb465bda37f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2015-08-06T22:28:32Z",
    "title_canon_sha256": "da0e067fa805a76d4a17e02387e627db2e2050b0e6f659f8789b7ab61231f0b3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.01555",
    "kind": "arxiv",
    "version": 1
  }
}