I've added some information to the Graph Theory, Sage, LaTeX page. For more complicated graphs, typesetting the placement of each individual vertex is too time consuming. Sage can help us out. Some of the important commands are located here. Many of the named graphs are posted here. SageTeX lets you use the power of Sage in both creating the graph and calculating the various parameters you want. You can find more details posted on that page along with working code to get you started.
Here are some stories that caught my eye over the last week:
- WTVR.com, CBS 6, reports "The mother of a Virginia middle school student said she was angry, frustrated, and mad after her son was handcuffed, suspended from school, and charged with stealing a 65-cent carton of milk from the cafeteria. As it turned out, Shamise Turk's son Ryan was on the school's free lunch program and the milk -- was free.....Police said the larceny charge was because Ryan tried to "conceal" the milk, a claim Ryan's mother denied. The school spokesperson said Ryan was suspended for theft, being disrespectful and using his cell phone in school."
- Money.CNN says, "For years, America's college campuses swelled with more and more students. But enrollment peaked in 2010 at just over 21 million students. Attendance has dropped every year since....The two types of colleges with the biggest declines in enrollment are: community colleges and for-profit universities. Those schools draw heavily from low-income and minority households."
- Reason.com checks in with today's most whiny generation at Oberlin, which was highlighted in a recent The New Yorker issue. "...activist students not only wanted to abolish all grades below a 'C,' they also thought faculty members should proactively offer them alternatives to taking a written, in-class midterm exam." The New Yorker had a longer piece which went into more detail "For years, a campus café and performance space called the Cat in the Cream had a music-themed mural, painted by an alumnus, that celebrated multiculturalism: it featured a turbanned snake charmer, a black man playing a saxophone, and so on. Students recently raised concerns that the mural was exoticizing. “We ended up putting drywall over it, and painting over that,” Robert Bonfiglio, who had been the chair of the Student Union Board, told me. “They were saying, ‘Students are being harmed. Just do something now.’ ” But if individuals’ feelings were grounds to efface art work, he reasoned, every piece of art at Oberlin would be in constant danger of being covered up, or worse—a practice with uncomfortable antecedents. “The fear in class isn’t getting something wrong but having your voice rejected,” he said. “People are so amazed that other people could have a different opinion from them that they don’t want to hear it.”...Copeland has taught at Oberlin since the nineteen-seventies. He was puzzled by many things about today’s students—“They do not make eye contact! They do not look into your motherfucking eyes!”—but what galled him most was their apparent eagerness to go over their professors’ heads. In the late fall of 2014, during rehearsals for a play he was coördinating, he spoke sharply to a student: a misfire not of language, he says, but of tone. The student ran out of the room. Copeland says that he wanted to smooth ruffled feathers and keep the production on track, so he agreed to meet with the student and his department chair. At the meeting, the student asked that he leave the room, and she and the department head spoke alone for about half an hour.Later, the dean of arts and sciences asked to meet with him. He reported complaints that Copeland had created “a hostile and unsafe learning environment,” and that he had “verbally berated” a student—but said that it must be kept confidential which student or incidents were concerned. Then the dean asked Copeland to sign a document acknowledging that a complaint had been lodged against him....He gave the dean a list of students he thought could confirm that he hadn’t “berated” anyone. He says the list was brushed aside: “They said, ‘What matters is that the student felt unsafe.’ ” Then he was told that, because gender could have been a factor, the issue was being investigated as a possible Title IX violation. That inquiry was later dropped; by then, Copeland had hired a lawyer. In September, 2015, the original inquiry was still going on, and Copeland said that the dean told him that if he wouldn’t meet without his lawyer he would be brought before the Professional Conduct Review Committee. Copeland and his lawyer welcomed that idea: the committee process would bring some daylight. They never heard back."
- Science Daily with a piece on titled "40-year math mystery and four generations of figuring" which "So, what is the Kelmans-Seymour Conjecture, anyway? Its name comes from Paul Seymour from Princeton University, who came up with the notion in 1977. Then another mathematician named Alexander Kelmans, arrived at the same conjecture in 1979. And though the Georgia Tech proof fills some 120 pages of math reasoning, the conjecture itself is only one short sentence: If a graph G is 5-connected and non-planar, then G has a TK5."
- Oregonlive reports "Portland Superintendent Carole Smith apologized Friday for allowing students and teachers at two schools to continue to drink tainted water after tests showed unsafe levels of lead...At Rose City Park, that meant students were free to drink lead-laced water for eight school days after district officials knew about the toxic results."
- ZeroHedge reports "Federal investigators revealed another blow to Detroit Public Schools this week. Meet Carolyn StarkeyDarden - the system’s former grant-development director - who has just been charged on suspicion of obtaining nearly $1.3 million by lying about children’s tutoring services....Carolyn Starkey Darden set up a company and allegedly ran a scheme between 2005 and 2012 in which she submitted fake invoices for tutoring services that were never provided to students, according to charges filed by the U.S. Attorney’s Office in Michigan’s Eastern District." This is so typical of the public school system where huge amounts of money can be easily skimmed by the corrupt. Because it's almost never about the kids.
- RT on the 8 year old who brought a loaded gun to class. "It is unclear to whom the gun belonged and what made the boy bring it to school. The NYPD said there were no arrests made so far. Authorities believe that the boy might have had a dispute with another child, and they suspect his teenage brother had something to do with this incident, WABC reported....This is the sixth time authorities in New York confiscated a firearm inside a city school since March. In one case, a 14-year-old boy brought a loaded 9-millimeter gun to Middle School 61. "
- The Third Shakmir tournament is underway with chess superstars Caruana, Kajarkin, Radjabov, Hou Yifan and more. The games can be followed live here.