Pith Number

pith:IBNTVPFZ

pith:2015:IBNTVPFZFDPDGDKZZNRIG3P3MB

not attested not anchored not stored refs pending

Hydra group doubles are not residually finite

Kristen Pueschel

arxiv:1507.02554 v2 · 2015-07-09 · math.GR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IBNTVPFZFDPDGDKZZNRIG3P3MB}

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	2026-05-18T01:36:06.759245Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

405b3abcb928de330d59cb62836dfb606410cf21fdc149afbcfc169d583bc0a0

Aliases

arxiv: 1507.02554 · arxiv_version: 1507.02554v2 · doi: 10.48550/arxiv.1507.02554 · pith_short_12: IBNTVPFZFDPD · pith_short_16: IBNTVPFZFDPDGDKZ · pith_short_8: IBNTVPFZ

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/IBNTVPFZFDPDGDKZZNRIG3P3MB \
  | 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: 405b3abcb928de330d59cb62836dfb606410cf21fdc149afbcfc169d583bc0a0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ba49bb93a071548fab6a77d0e57e2fa80079830b2f57e01ce0a4bc4c9b16ff1e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2015-07-09T15:28:03Z",
    "title_canon_sha256": "2b760bba1162b73cfc1a10d0526c1b739ceda52bd96e96a7990020672f7c7c7e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.02554",
    "kind": "arxiv",
    "version": 2
  }
}