Pith Number

pith:NCYDCUHI

pith:2011:NCYDCUHI6P7ZMDORDRJSKQFKWF

not attested not anchored not stored refs pending

Inverse Boundary Problems for Systems in Two Dimensions

Colin Guillarmou, Gunther Uhlmann, Leo Tzou, Pierre Albin

arxiv:1105.4565 v1 · 2011-05-23 · math.AP · math.DG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NCYDCUHI6P7ZMDORDRJSKQFKWF}

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	2026-05-18T04:21:23.161083Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

68b03150e8f3ff960dd11c532540aab15190053d34cb373ab78e9cdd59c1bcea

Aliases

arxiv: 1105.4565 · arxiv_version: 1105.4565v1 · doi: 10.48550/arxiv.1105.4565 · pith_short_12: NCYDCUHI6P7Z · pith_short_16: NCYDCUHI6P7ZMDOR · pith_short_8: NCYDCUHI

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/NCYDCUHI6P7ZMDORDRJSKQFKWF \
  | 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: 68b03150e8f3ff960dd11c532540aab15190053d34cb373ab78e9cdd59c1bcea

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "531a45c2f08e8b6b8aa4b5b1aa3693a5b2cd23108dc6684e4326a10770f945c7",
    "cross_cats_sorted": [
      "math.DG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2011-05-23T17:14:45Z",
    "title_canon_sha256": "a743d3e01dc971d867f07d4e7f1c2f87deade7d560e98c537abe4ca4229e7b82"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1105.4565",
    "kind": "arxiv",
    "version": 1
  }
}