Pith Number

pith:DYFR4UTQ

pith:2019:DYFR4UTQ5MHCFYVPVVYOM4DJAJ

not attested not anchored not stored refs pending

Rings of differentiable semialgebraic functions

E. Baro, J.M. Gamboa, Jos\'e F. Fernando

arxiv:1908.07257 v1 · 2019-08-20 · math.AG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DYFR4UTQ5MHCFYVPVVYOM4DJAJ}

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	2026-07-04T23:58:32.347725Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1e0b1e5270eb0e22e2afad70e6706902418badb23c9fc31b4f46ad45538ed9af

Aliases

arxiv: 1908.07257 · arxiv_version: 1908.07257v1 · doi: 10.48550/arxiv.1908.07257 · pith_short_12: DYFR4UTQ5MHC · pith_short_16: DYFR4UTQ5MHCFYVP · pith_short_8: DYFR4UTQ

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/DYFR4UTQ5MHCFYVPVVYOM4DJAJ \
  | 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: 1e0b1e5270eb0e22e2afad70e6706902418badb23c9fc31b4f46ad45538ed9af

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "780eda299b2a0fc1688de64d1e0fe94cd872792af215d637793cccd051f77fe8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2019-08-20T10:07:48Z",
    "title_canon_sha256": "3c9727342166417a4daf074dd4c545c732612fd6ad2dab78c835f7ec8f94bbab"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.07257",
    "kind": "arxiv",
    "version": 1
  }
}