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Paper Citation Record · LEDGER

Crystallographic splitting theorem for band representations and fragile topological photonic crystals

As of 16 August 2026, this Paper Citation Record lists 21 of 21 outbound references and 0 inbound Pith citation observations for arXiv:1908.08541.

A citation records a reference. It does not transfer a finding from one paper to another.

pith.paper-citation-record.v1
1908.08541 v2

Coverage vector

measured 21 of 21 reference resolution

Typed states for the displayed outbound observations.

Source: paper_references, paper_reference_links, observed 2026-08-14T11:44:46.522462Z

measured 21 of 21 standing notices

One-hop event checks from named stored sources.

Source: scholarly_work_events, retraction_status_cache, observed 2026-08-16T06:30:59.297886+00:00

measured 0 of 0 inbound itemization

Pith citing papers itemized under the disclosed page cap.

Source: paper_references, paper_reference_links

measured 0 of 1 external citation measurements

A source-named dated measurement, never combined with another source.

Source: cited_works

Reference resolution

21 of 21 outbound references displayed

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  • verified fuzzy15
  • unresolved5
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  • malformed identifier0
  • metadata mismatch0

External citation measurements

No source-named external measurement is stored.

Outbound references

Observation 744eeb78-55b4-4046-a6db-ce3a72a6c989 · outbound

This paper cites an unresolved cited work.

Crystallographic splitting theorem for band representations and fragile topological photonic crystals Unresolved cited work

Reference 1

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unresolved
raw_fallback, observed 2026-08-14T11:44:46.883126Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

source=pdf_text observed=2026-08-14T11:44:46.429366Z digest=sha256:84a4e896bad98a1f0337de8e525c2dbb872cb5f0623f40a67db8d7e85656b303

Observation 7f75ddef-69dc-4e8b-97d6-e271510b686d · outbound

This paper cites Since Pj is invariant under H [cf.

Crystallographic splitting theorem for band representations and fragile topological photonic crystals Since Pj is invariant under H [cf

Reference 2

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verified fuzzy
raw_fallback, observed 2026-08-14T11:44:46.917440Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

source=pdf_text observed=2026-08-14T11:44:46.414674Z digest=sha256:2f200fe538af60444999af3adcddd06d3e412c5af82cd42b7cacdcd5afb12cae

Observation 9ac977a2-cdfc-4e76-a66d-b12089544068 · outbound

This paper cites an unresolved cited work.

Crystallographic splitting theorem for band representations and fragile topological photonic crystals Unresolved cited work

Reference 3

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Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

source=pdf_text observed=2026-08-14T11:44:46.422034Z digest=sha256:ebae938a55ea0b4defbee122109b6de37700f413fa9b32bc78fb88fc5fda97d9

Observation 79407668-2bd9-4ced-81e3-d410a4177ba5 · outbound

This paper cites V B that the splitting P = ⊕N j=1Px j into bands of the projected position operator [cf.

Crystallographic splitting theorem for band representations and fragile topological photonic crystals V B that the splitting P = ⊕N j=1Px j into bands of the projected position operator [cf

Reference 4

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Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

source=pdf_text observed=2026-08-14T11:44:46.434800Z digest=sha256:0575d44488a5cc28e925ebb6c0de5e5ac1d0c8c039a03a31737156cb0feedfa4

Observation fe54adab-e5e0-48c6-93db-f644414697cf · outbound

This paper cites The reduced real-space coordinates of the two pairs of orbitals are (0 , 0, 0), in an orthog- onal basis of Bravais lattice vectors.

Crystallographic splitting theorem for band representations and fragile topological photonic crystals The reduced real-space coordinates of the two pairs of orbitals are (0 , 0, 0), in an orthog- onal basis of Bravais lattice vectors

Reference 5

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verified fuzzy
raw_fallback, observed 2026-08-14T11:44:46.845058Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

source=pdf_text observed=2026-08-14T11:44:46.440545Z digest=sha256:66482d401bccaecf54152e0f053b3e3215350f23b93d92e6fb1fad21e0d67b23

Observation 24b8fb8d-4af4-4189-bcc6-901702596ebf · outbound

This paper cites an unresolved cited work.

Crystallographic splitting theorem for band representations and fragile topological photonic crystals Unresolved cited work

Reference 6

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unresolved
raw_fallback, observed 2026-08-14T11:44:46.826119Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

source=pdf_text observed=2026-08-14T11:44:46.446289Z digest=sha256:a048dd963bbd92931216f88304561eef709e9b23b6eb99a20aa87a128605da3e

Observation ad717717-be14-421f-a95b-bd8bf3ae9b4a · outbound

This paper cites A finite group G is solvable if there exists a series of normal groups, i.e., C1 =G0◁G 1◁G 2...◁G k =G (F1) for a k ≥ 1, such that Gj+1/Gj is abelian for all j = 1,...,k − 1.

Crystallographic splitting theorem for band representations and fragile topological photonic crystals A finite group G is solvable if there exists a series of normal groups, i.e., C1 =G0◁G 1◁G 2...◁G k =G (F1) for a k ≥ 1, such that Gj+1/Gj is abelian for all j = 1,...,k − 1

Reference 7

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Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

source=pdf_text observed=2026-08-14T11:44:46.452226Z digest=sha256:ecc94fe5810535c41549cb38cb68faa9254df0ead7d89f80fb99391056ce5a57

Observation 935a0810-90d1-439e-8c01-e7b30112bd4f · outbound

This paper cites an unresolved cited work.

Crystallographic splitting theorem for band representations and fragile topological photonic crystals Unresolved cited work

Reference 8

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unresolved
raw_fallback, observed 2026-08-14T11:44:46.789692Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

source=pdf_text observed=2026-08-14T11:44:46.457437Z digest=sha256:3daf8b4898df08b1b4d9b7c8a0c84b9712cb0f94dfb4c3bc683b26cb63c71e10

Observation 172697d5-8716-4a3e-9ced-6873cac6e3ae · outbound

This paper cites The 11 point groups constructed in this way are S2, C2h, C3i, C4h, C6h, D2h, D3d, D4h, D6h, Th and Oh.

Crystallographic splitting theorem for band representations and fragile topological photonic crystals The 11 point groups constructed in this way are S2, C2h, C3i, C4h, C6h, D2h, D3d, D4h, D6h, Th and Oh

Reference 9

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Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

source=pdf_text observed=2026-08-14T11:44:46.462601Z digest=sha256:01349cf2326a8d0c8156ad9068f2aa0106713c26b33bb5b40308549958368ec7

Observation 4a99fad9-9344-46cf-a8b4-c19737a60ad0 · outbound

This paper cites Review of the semi-direct product.

Crystallographic splitting theorem for band representations and fragile topological photonic crystals Review of the semi-direct product

Reference 10

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No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

source=pdf_text observed=2026-08-14T11:44:46.467865Z digest=sha256:3858f0f372211dbbb80791464bee04aa7f8f0c7a9f1fc157915ac6d5f53515cf

Observation 18e3f031-7613-40bc-b10d-21cc6365ca31 · outbound

This paper cites This two-fold rotational symmetry generates C′′ 2.

Crystallographic splitting theorem for band representations and fragile topological photonic crystals This two-fold rotational symmetry generates C′′ 2

Reference 11

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No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

source=pdf_text observed=2026-08-14T11:44:46.473265Z digest=sha256:654c8e880e8194469181ef3c525122449ccc40ed925bc1929adda8e44a0a9aa2

Observation 8744502c-0b68-496b-bb90-19e0217a4706 · outbound

This paper cites F 1 to prove that all 27 noncubic double point groups [class (2)] are monomial.

Crystallographic splitting theorem for band representations and fragile topological photonic crystals F 1 to prove that all 27 noncubic double point groups [class (2)] are monomial

Reference 12

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No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

source=pdf_text observed=2026-08-14T11:44:46.478443Z digest=sha256:e2174ee65dc44ab61fc06397d7e84bc6c1c95ca34b9c09816a7cc8691058c0b6

Observation 2c99cca6-6757-454a-956e-543d688260bf · outbound

This paper cites F 4 b that allP in class (2)A are monomial; then, according to the Lemma for monomial direct-product groups in App.

Crystallographic splitting theorem for band representations and fragile topological photonic crystals F 4 b that allP in class (2)A are monomial; then, according to the Lemma for monomial direct-product groups in App

Reference 13

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Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

source=pdf_text observed=2026-08-14T11:44:46.483601Z digest=sha256:d488417808e6a877924eeabfcb744d4c8e57f1f8ce72b091a674f86555b86970

Observation 237aefc1-0385-4bb9-9d94-3ce2ea68dad2 · outbound

This paper cites Our proof relies on Wigner’s seminal result, 104 namely that all irreps ofPT =P× ZT 2 are induced from irreps of the crystallographic point group P.

Crystallographic splitting theorem for band representations and fragile topological photonic crystals Our proof relies on Wigner’s seminal result, 104 namely that all irreps ofPT =P× ZT 2 are induced from irreps of the crystallographic point group P

Reference 14

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No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

source=pdf_text observed=2026-08-14T11:44:46.488286Z digest=sha256:7987b0625c2ba470d974af06120f430032d9c18b54d3f989dba645c8e6cd53e4

Observation 399383a8-f46b-472d-9610-f1969f457de2 · outbound

This paper cites ˜T and ˜O are standard examples of non-monomial groups.188 Example of non-monomial irrep of double cubic point group ˜T.

Crystallographic splitting theorem for band representations and fragile topological photonic crystals ˜T and ˜O are standard examples of non-monomial groups.188 Example of non-monomial irrep of double cubic point group ˜T

Reference 15

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Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

source=pdf_text observed=2026-08-14T11:44:46.492925Z digest=sha256:7c0f7df25f8a8b43ad83afdfb144a0717cdfc9c6878dccd289077074de32dfc5

Observation e717ca84-c5ba-4ed5-8583-832754fdebdf · outbound

This paper cites an unresolved cited work.

Crystallographic splitting theorem for band representations and fragile topological photonic crystals Unresolved cited work

Reference 16

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No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

source=pdf_text observed=2026-08-14T11:44:46.497697Z digest=sha256:a9ec24933567b1df429a2913770fcb05594b8982a5bc725b7850a49ef025834a

Observation ed83186e-e3b0-4d53-8c1f-e3a305188e2a · outbound

This paper cites Of the three remaining double cubic point groups, two have the direct-product form: ˜Th = ˜T× Zi 2 and ˜Oh = ˜O× Zi.

Crystallographic splitting theorem for band representations and fragile topological photonic crystals Of the three remaining double cubic point groups, two have the direct-product form: ˜Th = ˜T× Zi 2 and ˜Oh = ˜O× Zi

Reference 17

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No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

source=pdf_text observed=2026-08-14T11:44:46.502800Z digest=sha256:cc0fa734e863c337ccaf0e102e30cf17354bc905855ff59871bc016351827bd5

Observation 85b91ad0-2251-45fd-a234-988bf675c1c7 · outbound

This paper cites F 4.) Since ˜O and ˜T are non-monomial, it follows that ˜Oh and ˜Th must also be non-monomial, according to the Lemma for monomial direct-product groups in App.

Crystallographic splitting theorem for band representations and fragile topological photonic crystals F 4.) Since ˜O and ˜T are non-monomial, it follows that ˜Oh and ˜Th must also be non-monomial, according to the Lemma for monomial direct-product groups in App

Reference 18

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verified fuzzy
raw_fallback, observed 2026-08-14T11:44:46.627314Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

source=pdf_text observed=2026-08-14T11:44:46.507184Z digest=sha256:cbf6f3f03e08188d67fe9a6a9cb24c01519e91d16204b2624bf62e236abfc417

Observation 35b29194-213f-4990-bdc6-3ce43cefb05f · outbound

This paper cites A 1 from the perspective of band theory.

Crystallographic splitting theorem for band representations and fragile topological photonic crystals A 1 from the perspective of band theory

Reference 19

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Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

source=pdf_text observed=2026-08-14T11:44:46.512544Z digest=sha256:cdc3185882fd925fe051f9717a370724f458113c0402547928d8449310d33c55

Observation 7366a28e-bdae-4949-a34a-ae26e89b98b5 · outbound

This paper cites For simplicity, let us consider a rank-N BR(G, ϖ,D ).

Crystallographic splitting theorem for band representations and fragile topological photonic crystals For simplicity, let us consider a rank-N BR(G, ϖ,D )

Reference 20

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No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

source=pdf_text observed=2026-08-14T11:44:46.517435Z digest=sha256:ce58d8340fd6116bac525546bbe2425502ac2d5248133679fc4ce4db20387b58

Observation f1c69a6b-29ae-4645-a39d-e614052c5b7c · outbound

This paper cites Wilson loop approach to fragile topology of split elementary band representations and topological crystalline insulators with time reversal symmetry.

Crystallographic splitting theorem for band representations and fragile topological photonic crystals Wilson loop approach to fragile topology of split elementary band representations and topological crystalline insulators with time reversal symmetry

Reference 21

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local_arxiv, observed 2026-08-14T11:44:46.571819Z

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No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

source=pdf_text observed=2026-08-14T11:44:46.522462Z digest=sha256:eb67834efe8115c9bdda2728af7f4a799c2a61cc3c09d9e07f52df594bf272aa

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