Pith Number

pith:CHBTD5KY

pith:2018:CHBTD5KYRSJCXBGDAQI6ID5L7E

not attested not anchored not stored refs pending

Finite element error estimates in $L^2$ for regularized discrete approximations to the obstacle problem

Christian Kahle, Dominik Hafemeyer, Johannes Pfefferer

arxiv:1811.09260 v1 · 2018-11-22 · math.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CHBTD5KYRSJCXBGDAQI6ID5L7E}

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	2026-05-18T00:00:03.797974Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

11c331f5588c922b84c30411e40fabf92d7fd01be9fb5058d2f81baa2cc0f0ab

Aliases

arxiv: 1811.09260 · arxiv_version: 1811.09260v1 · doi: 10.48550/arxiv.1811.09260 · pith_short_12: CHBTD5KYRSJC · pith_short_16: CHBTD5KYRSJCXBGD · pith_short_8: CHBTD5KY

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/CHBTD5KYRSJCXBGDAQI6ID5L7E \
  | 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: 11c331f5588c922b84c30411e40fabf92d7fd01be9fb5058d2f81baa2cc0f0ab

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3bd9b829c9d0d87385aa1f214cc96a68ba8940c6a177b961599b074e030ba6b7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-11-22T18:11:28Z",
    "title_canon_sha256": "88a9d208ce41713bdb42cff8194e22cb56572fe626728b3ec12bb3ef1da74a63"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.09260",
    "kind": "arxiv",
    "version": 1
  }
}