Quasipolynomial formulas for the Kronecker coefficients indexed by two two-row shapes (extended abstract)

We show that the Kronecker coefficients indexed by two two–row shapes are given by quadratic quasipolynomial formulas whose domains are the maximal cells of a fan. Simple calculations provide explicitly the quasipolynomial formulas and a description of the associated fan. These new formulas are obtained from analogous formulas for the corresponding reduced Kronecker coefficients and a formula recovering the Kronecker coefficients from the reduced Kronecker coefficients. As an application, we characterize all the Kronecker coefficients indexed by two two-row shapes that are equal to zero. This allowed us to disprove a conjecture of Mulmuley about the behavior of the stretching functions attached to the Kronecker coefficients.Ministerio de Educación y Ciencia MTM2007–64509Junta de Andalucía FQM–33

PARADISE...THEY MAKE YOU FEEL AT HOME : A CASE STUDY ON UNDERSTANDING THE ROLE OF AN UNDOCUMENTED STUDENT RESOURCE CENTER AND ITS INFLUENCE ON THE COLLEGE JOURNEY OF UNDOCUMENTED STUDENTS

Access to U.S. higher education for undocumented students has been challenging over the years despite recent legislative and organizational changes that have afforded some the opportunity to enroll in post-secondary institutions (Conger & Chellman, 2013; Juárez, 2017; Pérez, 2010). Of the approximately 65,000 undocumented students who graduate from high schools across the country every year, only 7,000-13,000 enroll in post-secondary institutions annually (Gildersleeve & Hernandez, 2012; Muñoz, 2013). However, most recent data reveal that an estimated 98,000 undocumented students graduate from high schools across the country every year (Zong & Batalova, 2019). Despite these challenges, undocumented students are resilient and have high educational aspirations. The purpose of this study was to explore the role an Undocumented Student Resource Center (USRC) plays in the college journey of undocumented students. The research questions that guided the study were: 1) How does an USRC at a four-year, public, comprehensive university influence the experiences of undocumented students, if at all?; 2) What strategies does an USRC implement to support undocumented students, if any?; and 3) How does an USRC influence the persistence of undocumented students, if at all?. Using an intrinsic case study design, data were collected through semi-structured interviews, document analysis, and participant observations. Although there are studies that have focused on the experiences of undocumented students in higher education, there is limited research on Undocumented Student Resource Centers (USRCs) and the role they play in student success. Accordingly, the purpose of this intrinsic case study was to explore the role of an USRC and its influence in the college journey of undocumented students at Westside University (WU). The six major interrelated themes constructed from the data included: 1) Facilitating College Access; 2) Breaking Down Barriers; 3) Alleviating Fear; 4) Fostering Acompañamiento; 5) Promoting Agency and Advocacy; and 6) Advancing Post-Baccalaureate Education and Career Choice

Women Searching for Missing Persons in Mexico. Guidelines for a Public Policy with a Gender Perspective

The increase in the disappearance of people in Mexico has been the reason why women in various circumstances carry out actions at any risk to find their loved ones others voluntarily join this cause they are called seekers and their search leadership is forceful In this study it is noted that there are no official figures that identify how many there are and their various situations are posed as a public problem that requires a gender analysis to understand and reveal the dimension of their realities in which they operate under a context of abandonment violence inequalities and discrimination that derive from structural causes in a patriarchal society It is reflected that guidelines are proposed towards a public policy that recognizes their own identity and has a transforming effect to guarantee and protect their human rights as wome

Discerning the relationship between geminiviral infection and vesicle trafficking using virus induced gene silencing

Tomato yellow leaf curl disease is one of the most important threats to tomato crops worldwide. One of its causal agents, Tomato yellow leaf curl Sardinian virus (TYLCSV) is a monopartite member of the genus Begomovirus from the family Geminiviridae. Due to the few proteins encoded by their viral genome, geminiviruses rely heavily on host cellular machineries and interact with a wide range of plant proteins to complete all processes required for infection, such as viral replication, movement and suppression or evasion of plant defence mechanisms. The identification of the host proteins involved in viral infection will be an important step towards the understanding of the mechanisms underlying this process. In our laboratory, transgenic Nicotiana benthamiana plants containing a green fluorescent protein (GFP) expression cassette flanked by two direct repeats of the intergenic region of TYLCSV have been constructed (2IR plants). When these plants are infected with TYLCSV, an overexpression of the reporter gene is observed in those cells where the virus is actively replicating. These plants have been used together with virus induced gene silencing (VIGS) in an effort to identify host genes involved in the infection process using a reverse genetics approach. Using this combined technique our group has identified two genes δ-COP and ARF 1, involved in retrograde vesicle trafficking, which are essential for the infectious process. We are currently assaying genes codifying proteins involved in different pathways of the vesicle trafficking system: Sar1b, γ subunit of AP1, Sec24, SYT1 and two that encode the heavy chain of triskelion proteins. Their effect over viral infection will be presented and discussedUniversidad de Málaga. Campues de Excelencia Internacional Andalucía Tech

Identifying the function of vesicle trafficking in geminiviral infection using virus induced gene silencing

Tomato yellow leaf curl Sardinian virus (TYLCSV) is one of the causal agent of the tomato yel-low leaf curl disease, one of the most important threats to tomato crops worldwide. TYLCSV is a monopartite member of the genus Begomovirus from the family Geminiviridae. To carry out a full infection, geminiviruses need to move inside the infected cell and from one cell to an-other for which they depend on diverse cellular factors. While cell-to-cell movement has been described to occur through plasmodesmata, the way in which geminiviruses move inside the host cells is yet unknown. The identification of the host proteins involved in viral infection will be an important step to-wards the understanding of the mechanisms underlying this process. In our laboratory, trans-genic Nicotianabenthamiana plants containing a green fluorescent protein (GFP) expression cassette flanked by two direct repeats of the intergenic region of TYLCSV have been construct-ed (2IR plants). When these plants are infected with TYLCSV, an overexpression of the reporter gene is observed in those cells where the virus replicates. These plants have been used to-gether with virus induced gene silencing (VIGS) in an effort to identify host genes involved in the infection process using a reverse genetics approach. Using this combined technique our group has identified two genes δ-COP and ARF 1, involved in retrograde vesicle trafficking, which are essential for the infectious process. We are current-ly assaying genes codifying proteins involved in different pathways of the vesicle trafficking system: Sar1b, γ subunit of AP1, Sec24, SYT1 and two that encode the heavy chain of triskelion proteins. Their effect over virus infection will be presented and discussed.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Invariance properties for coefficients of symmetric functions

International audienceWe show that several of the main structural constants for symmetric functions (Littlewood-Richardsoncoefficients, Kronecker coefficients, plethysm coefficients, and the Kostka–Foulkes polynomials) share invarianceproperties related to the operations of taking complements with respect to rectangles and adding rectangles.Nous montrons que plusieurs des principales constantes de structure de la théorie des fonctions symétriques(les coefficients de Littlewood–Richardson, les coefficients de Kronecker, les coefficients du pléthysme, et les polynômesde Kostka–Foulkes) ont en commun des symétries décrites par des opérations de complémentation dans des rectangleset d’ajout de rectangles pour les partitions qui les étiquettent

Reduced Kronecker coefficients and counter-examples to Mulmuley's strong saturation conjecture SH

We provide counter-examples to Mulmuley's strong saturation conjecture (strong SH) for the Kronecker coefficients. This conjecture was proposed in the setting of Geometric Complexity Theory to show that deciding whether or not a Kronecker coefficient is zero can be done in polynomial time. We also provide a short proof of the #P-hardness of computing the Kronecker coefficients. Both results rely on the connections between the Kronecker coefficients and another family of structural constants in the representation theory of the symmetric groups: Murnaghan's reduced Kronecker coefficients. An appendix by Mulmuley introduces a relaxed form of the saturation hypothesis SH, still strong enough for the aims of Geometric Complexity Theory.Comment: 25 pages. With an appendix by Ketan Mulmuley. To appear in Computational Complexity. See also http://emmanuel.jean.briand.free.fr/publications

Food Rescue Program Evaluation Three Square Food Bank

With 48 million Americans currently struggling with hunger, addressing food insecurity in U.S. communities remains a persistent issue in need of a remedy. Conversely, food waste is the single largest material deposited in American landfills, with an estimated 70 billion pounds wasted annually. The recovery of this food waste, or “food rescue” in food banking jargon, offers an ideal solution to fight hunger in our communities. With Three Square Food Bank (Three Square) consistently seeking to increase food rescue and distribution in its efforts to eliminate hunger, the need to ensure operational effectiveness and efficiency through programmatic change and improvement is a constant driving force within the organization. This report provides an examination and evaluation of Three Square’s Food Rescue program in Southern Nevada