Pith Number

pith:KXPJBZCU

pith:2019:KXPJBZCUSG63S37MIPHQB5VEUR

not attested not anchored not stored refs pending

A remark on approximation with polynomials and greedy bases

Antonio P\'erez, Pablo M. Bern\'a

arxiv:1903.01763 v1 · 2019-03-05 · math.FA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KXPJBZCUSG63S37MIPHQB5VEUR}

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	2026-05-17T23:51:59.817663Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

55de90e45491bdb96fec43cf00f6a4a44a70b1a3740429fda657cf0a5b86ed5c

Aliases

arxiv: 1903.01763 · arxiv_version: 1903.01763v1 · doi: 10.48550/arxiv.1903.01763 · pith_short_12: KXPJBZCUSG63 · pith_short_16: KXPJBZCUSG63S37M · pith_short_8: KXPJBZCU

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/KXPJBZCUSG63S37MIPHQB5VEUR \
  | 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: 55de90e45491bdb96fec43cf00f6a4a44a70b1a3740429fda657cf0a5b86ed5c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b50945c83ab2f4f1ccaafcb89e0b42b1d49c4227630e6d383a6fe8cf8adca3d4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.FA",
    "submitted_at": "2019-03-05T10:42:15Z",
    "title_canon_sha256": "a77b29334ac9c865f4b4229e7fbb2c5c45680ce479b3dd5d567f5cceb7666359"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.01763",
    "kind": "arxiv",
    "version": 1
  }
}