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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 22 for “"Schreier"”.
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Free groups and the axiom of choice
The Nielsen–Schreier theorem states that subgroups of free groups are free. As all of its proofs use the Axiom of Choice, it is natural to ask whether the theorem is equivalent to the Axiom of Choice. Other questions arise in this context, such as whether the same is true for free abelian groups, …
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Two problems in the theory of curves over fields of positive characteristic
… half, we define, so called, generalized Artin-Schreier cover of a scheme X over k. After defining Artin-Schreier group scheme Γ over X, a generalized Artin-Schreier cover is realized as a principal homogeneous space of Γ. We are especially interested in the case when X is P1\{0,1,∞}, a thrice …
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Trace Forms Over Finite Fields of Characteristic Two
… Then determines new set of maximal Artin-Schreier curves with possible pair of invariants, finds possible trace forms with specific co-dimemntion and provides a new family of binary sequences having low correlation values.
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Ray classfields of global function with many rational places
… für S-Klassenzahlen explizite Artin- Schreier-Gleichungen einige spezielle Strahlklassenkörper. Verfasser schließt einer Liste Tabellen Funktionenkörper rationalen den GF(2) GF(3) GF(4) GF(8) GF(9).
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Monoid Extensions, Relaxed Actions and Cohomology
… are studied and characterized, the weakly Schreier split extensions. It is demonstrated that both Artin glueings of frames and λ-semidirect products of inverse semigroups are examples of these extensions. The characterization is given in terms of a generalization of an action. This makes …
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Properties and Legacies of Tsirelson Space
… of non-embedding of various sequence spaces into Schreier space and Baernstein space then prepare us for the main result: the proof of the non-embedding of c_0 and l_p from 1\leqslant p< infinity in Tsirelson space. We close by discussing further properties of Tsirelson space, including …
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Local-to-Global extensions for wildly ramified covers of curves
… an extension. Using a generalization of Artin-Schreier theory to non-abelian p-groups, we characterize the curves Y for which this extension property holds and for which it is unique up to isomorphism, but over a more general ground field.
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On groups and initial segments in nonstandard models of Peano Arithmetic
… as a result analogous to the result of Baer, Schreier and Ulam for infinite symmetric groups. The external structure of nonstandard cyclic groups of prime order is identified as that of infinite dimensional rational vector spaces and the normal subgroup structure of nonstandard projective …
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A continuous-time multi-stage noise-shaping delta-sigma modulator for next generation wireless applications
… 85dB, peak SNDR of 74.9dB, SFDR of 89.3dBc and Schreier FOM of 172.9dB over a 50MHz bandwidth at a 1.8GHz sampling frequency.
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Unprovability and phase transitions in Ramsey theory
… by presenting an unprovable statement related to Schreier families. Chapter 6 is intended as a vast introduction to the Atlas of prefixed polynomial equations. We begin with the necessary definitions, present some specific members of the Atlas, discuss several issues and give technical details.
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A Continuous-Time Pipeline ADC with Reduced Sensitivity to Clock Jitter
… area is 0.77mm² and the ADC consumes 240mW. The Schreier figure-of-merit (FOMS) is 157.9dB which is amongst the best in comparison to other state-of-the-art continuous-time ADCs with digitization bandwidth greater than 500MHz.
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A Case Study of One Teacher's Experience Using a Sociocultural View of Disability in the English Classroom
… Analysis (Stewart, 2011) and content analysis (Schreier, 2014) was used to examine the context and process of planning and implementation for an ELA teacher in order to uncover the meaning-making processes that the teacher undergoes when using literature to examine disability critically. …
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Vliv parametrů vazebného média a struktury povrchu na kvalitu snímaného signálu akustické emise
Diplomová práce se zabývá vlivem různých vazebných prostředí a struktury povrchu na vybrané parametry akustické emise (AE). Jsou zde srovnány amplitudy signálu naměřené při použití pěti různých vazebných médií při teplotách 20°C a 80°C. Pro sledování vlivu drsnosti povrchu na parametry AE byl …
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Amalgamation in varieties of algebras
… lattices and Boolean algebras. In 1927, O. Schreier showed that for any set of extensions of a given group, there is another extension of that group that in some sense contains all other extensions in the set. This property of groups, known as the amalgamation property was generalized to a …
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Design techniques for Power-Efficient Delta-Sigma Analogue-to-Digital Converters
… Figure-of-Merit (FoMW), and the latter, by the Schreier Figure-of-Merit (FoMS). Technology scaling over the past decades has indicated that FoMS, in noise-limited ADCs, captures more precisely the power efficiency than its counterpart. While the performance of noise-limited ADCs has advanced …
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«Στάσεις και αντιλήψεις των αναγνωστών ψηφιακών ειδησεογραφικών ιστοσελίδων για το φαινόμενο της ανήλικης παραβατικότητας: Ποιοτική ανάλυση»
… ανάλυση περιεχομένου (Krippendorff, 2019· Schreier, 2012), εφαρμόζοντας συστηματική θεματική κωδικοποίηση σε 935 σχόλια αναγνωστών που συλλέχθηκαν από τις ιστοσελίδες του Πρώτου Θέματος και της Εφημερίδας των Συντακτών κατά το χρονικό διάστημα Ιανουάριος–Οκτώβριος 2024. Οι μονάδες ανάλυσης …
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