Pith Number

pith:2RDMYOGW

pith:2007:2RDMYOGW7GMOGSCCVXBMFHD72C

not attested not anchored not stored refs pending

Approximation of Partially Smooth Functions

Erlend Fornaess Wold, John Fornaess, Yinxia Wang

arxiv:math/0703243 v1 · 2007-03-08 · math.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2RDMYOGW7GMOGSCCVXBMFHD72C}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T01:38:23.247759Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d446cc38d6f998e34842adc2c29c7fd09abe00e484639412081365474aae81d6

Aliases

arxiv: math/0703243 · arxiv_version: math/0703243v1 · doi: 10.48550/arxiv.math/0703243 · pith_short_12: 2RDMYOGW7GMO · pith_short_16: 2RDMYOGW7GMOGSCC · pith_short_8: 2RDMYOGW

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/2RDMYOGW7GMOGSCCVXBMFHD72C \
  | 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: d446cc38d6f998e34842adc2c29c7fd09abe00e484639412081365474aae81d6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a21726aac7a96080d427478580a485352c86b4cea8451b7c6c769e94787031f2",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.DS",
    "submitted_at": "2007-03-08T23:14:47Z",
    "title_canon_sha256": "1029a87878f28e9afb8011f4550899022671f67ddf9d21a33f3dc9b2cae3c698"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0703243",
    "kind": "arxiv",
    "version": 1
  }
}