Pith Number

pith:DFZPP2LB

pith:2026:DFZPP2LB6RQGKWEGXRX7NJ7VJW

not attested not anchored not stored refs pending

Undecidable Diophantine problems in generalisations of one-relator groups

Alex Levine, Robert D. Gray

arxiv:2605.30535 v1 · 2026-05-28 · 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{DFZPP2LB6RQGKWEGXRX7NJ7VJW}

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	2026-06-01T01:02:59.570293Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1972f7e961f460655886bc6ff6a7f54d80f4576602df17f4429dd15df6ec8656

Aliases

arxiv: 2605.30535 · arxiv_version: 2605.30535v1 · doi: 10.48550/arxiv.2605.30535 · pith_short_12: DFZPP2LB6RQG · pith_short_16: DFZPP2LB6RQGKWEG · pith_short_8: DFZPP2LB

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/DFZPP2LB6RQGKWEGXRX7NJ7VJW \
  | 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: 1972f7e961f460655886bc6ff6a7f54d80f4576602df17f4429dd15df6ec8656

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "206262ba4e31e630aac5bf5d0f648b686c5976b7fac118395094187a52302933",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2026-05-28T20:10:22Z",
    "title_canon_sha256": "ad5310ddd569a38e12c474fb946e2fbaf70f0ab363250db675e58ca4aa148e7a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.30535",
    "kind": "arxiv",
    "version": 1
  }
}