Pith Number

pith:SEFJHCY7

pith:2025:SEFJHCY7N5SRGQKFFK2U3G57WB

not attested not anchored not stored refs pending

An EZ-structure for the mapping class group

Ursula Hamenst\"adt

arxiv:2505.18808 v4 · 2025-05-24 · 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{SEFJHCY7N5SRGQKFFK2U3G57WB}

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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.

Cited by

1 paper in Pith

On the connectedness of the boundary of hierarchically hyperbolic spaces

Receipt and verification

First computed	2026-07-07T02:18:24.942462Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

910a938b1f6f651341452ab54d9bbfb0431e5fad5b5587cd1b9566ceec973c79

Aliases

arxiv: 2505.18808 · arxiv_version: 2505.18808v4 · doi: 10.48550/arxiv.2505.18808 · pith_short_12: SEFJHCY7N5SR · pith_short_16: SEFJHCY7N5SRGQKF · pith_short_8: SEFJHCY7

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/SEFJHCY7N5SRGQKFFK2U3G57WB \
  | 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: 910a938b1f6f651341452ab54d9bbfb0431e5fad5b5587cd1b9566ceec973c79

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1dbf20395af113821782babd3327fa5fef4f9d789e20475686c62ac6fa411de4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2025-05-24T17:45:41Z",
    "title_canon_sha256": "f9d8885472031bd89f82d5873875dbfe14e03c2479b55880ac0323c821985010"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2505.18808",
    "kind": "arxiv",
    "version": 4
  }
}