Pith Number

pith:DO3QANYR

pith:2015:DO3QANYRXJ4TL653LQI7WMA7BS

not attested not anchored not stored refs pending

Finite element quasi-interpolation and best approximation

Alexandre Ern, Jean-Luc Guermond

arxiv:1505.06931 v4 · 2015-05-26 · 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{DO3QANYRXJ4TL653LQI7WMA7BS}

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	2026-05-18T01:03:06.526125Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1bb7003711ba7935fbbb5c11fb301f0cb339eb4e381e9ea1f57325b36b8e25a8

Aliases

arxiv: 1505.06931 · arxiv_version: 1505.06931v4 · doi: 10.48550/arxiv.1505.06931 · pith_short_12: DO3QANYRXJ4T · pith_short_16: DO3QANYRXJ4TL653 · pith_short_8: DO3QANYR

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/DO3QANYRXJ4TL653LQI7WMA7BS \
  | 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: 1bb7003711ba7935fbbb5c11fb301f0cb339eb4e381e9ea1f57325b36b8e25a8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "71c70b783b21bbb562d3636c9210372bdff8e8b4831ac6fdd85da872807c29a8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2015-05-26T13:00:32Z",
    "title_canon_sha256": "8a068132015311f18664ca2c24bfb2a13448ef9cfb93db4914087b2a1edc41e0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1505.06931",
    "kind": "arxiv",
    "version": 4
  }
}