Pith Number

pith:U5IGGM6P

pith:2015:U5IGGM6PMTY7NZQYJM7T3SS7PY

not attested not anchored not stored refs pending

Kolmogorov widths and low-rank approximations of parametric elliptic PDEs

Albert Cohen, Markus Bachmayr

arxiv:1502.03117 v1 · 2015-02-10 · 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{U5IGGM6PMTY7NZQYJM7T3SS7PY}

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	2026-05-18T02:27:20.533951Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a7506333cf64f1f6e6184b3f3dca5f7e29f1c9d7f07b76e8579e335075add601

Aliases

arxiv: 1502.03117 · arxiv_version: 1502.03117v1 · doi: 10.48550/arxiv.1502.03117 · pith_short_12: U5IGGM6PMTY7 · pith_short_16: U5IGGM6PMTY7NZQY · pith_short_8: U5IGGM6P

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/U5IGGM6PMTY7NZQYJM7T3SS7PY \
  | 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: a7506333cf64f1f6e6184b3f3dca5f7e29f1c9d7f07b76e8579e335075add601

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0581b90e433ce22e5267bb7d990c887e737c1e49ffe36102ca83b66cdbdcca75",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2015-02-10T21:08:48Z",
    "title_canon_sha256": "4f7ce4e7cfe2f1dbe279bcfab3d15e3b7b571fed27887977589565a41356d0fa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.03117",
    "kind": "arxiv",
    "version": 1
  }
}