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Keywords: case study, COVID-19 epidemic, distance schooling, elementary school, children, development, attitudes towards school, self-perceived school competence, general self-esteem
Published in RUP: 24.06.2021; Views: 1052; Downloads: 14
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Abstract: Let ▫$H_n$▫ be the set of all ▫$n \times n$▫ hermitian matrices over ▫$\mathbb{C}$▫, ▫$n \ge 3$▫. It is said that ▫$A,B \in H_n$▫ quasi-commute if there exists a nonzero ▫$\xi \in \mathbb{C}$▫ such that ▫$AB = \xi BA$▫ Bijective not necessarily linear maps on hermitian matrices which preserve quasi-commutativity in both directions are classified.
Keywords: mathematics, linear algebra, general preserver, hermitian matrices, quasi-commutativity
Published in RUP: 03.04.2017; Views: 2194; Downloads: 255
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Abstract: Let ▫$M_n$▫ be the algebra of all ▫$n \times n$▫ matrices over ▫$\mathbb{C}$▫. We say that ▫$A, B \in M_n$▫ quasi-commute if there exists a nonzero ▫$\xi \in \mathbb{C}$▫ such that ▫$AB = \xi BA$▫. In the paper we classify bijective not necessarily linear maps ▫$\Phi \colon M_n \to M_n$▫ which preserve quasi-commutativity in both directions.
Keywords: mathematics, linear algebra, general preserver, matrix algebra, quasi-commutativity
Published in RUP: 03.04.2017; Views: 2406; Downloads: 79
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Abstract: Training funds are used to incentivize training in developing countries, but the funds are based on payroll taxes that lower the return to training. In the absence of training funds, larger, high-wage and more capital-intensive firms are the most likely to offer training unless they are liquidity constrained. If firms are not liquidity constrained, the fund could lower training investments. Using an administrative data set on the Mauritius training fund, we find that the firms most likely to train pay more in taxes than they gain in subsidies. The smallest firms receive more benefits than they pay in taxes.
Keywords: izobraževanje, usposabljanje, splošna znanja, specifična znanja, financiranje izobraževanja, training, general skills, firm-specific skills, training fund, externality, cross-subsidy, tax
Published in RUP: 08.08.2016; Views: 2747; Downloads: 127
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