Pith Number

pith:EIH4KCXK

pith:2012:EIH4KCXKYT2DHQ33ZR5JPZJ5MX

not attested not anchored not stored refs pending

The q-analogue of the wild fundamental group and the inverse problem of the Galois theory of q-difference equations

Jacques Sauloy, Jean-Pierre Ramis

arxiv:1207.0107 v2 · 2012-06-30 · math.QA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EIH4KCXKYT2DHQ33ZR5JPZJ5MX}

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	2026-05-18T03:39:43.466906Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

220fc50aeac4f433c37bcc7a97e53d65c83d9b9a8911f308c34ba6aeb0dcef5e

Aliases

arxiv: 1207.0107 · arxiv_version: 1207.0107v2 · doi: 10.48550/arxiv.1207.0107 · pith_short_12: EIH4KCXKYT2D · pith_short_16: EIH4KCXKYT2DHQ33 · pith_short_8: EIH4KCXK

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/EIH4KCXKYT2DHQ33ZR5JPZJ5MX \
  | 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: 220fc50aeac4f433c37bcc7a97e53d65c83d9b9a8911f308c34ba6aeb0dcef5e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2137eae7dc193bfe1e3c853dd8b8e2bc3bc5c37e59abe61efadd3f6a02e9c4b8",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/3.0/",
    "primary_cat": "math.QA",
    "submitted_at": "2012-06-30T15:14:45Z",
    "title_canon_sha256": "134461e5c260c0a11e654207c30c0625512c80ff23a0b5b27a309b262eb2e117"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1207.0107",
    "kind": "arxiv",
    "version": 2
  }
}