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At an umbilic all the sectional curvatures are equal ; in particular the principal curvatures are equal.
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At and umbilic
** At umbilic points, both principal curvatures are equal and every tangent vector can be considered a principal direction.
** At flat umbilic points both principal curvatures are zero.
At and all
At noontime, remembering what the teacher had said about maybe playing with the kids, Jack stayed close to the schoolhouse while all the other big boys, except Charles, went off out the road to play ball.
At the same time, all suggestions that some sort of societal responsibility existed for the welfare of the people within the territorial state was strongly resisted.
At the heart of all of this was the square, which one such traveler declared to be `` as spacious, as pleasant and aromatick a Market as any in the Universe ''.
At one time she felt impelled to make dances that `` moved all over the stage '', much as Pollock's paintings move violently over the full extent of the canvas.
At first glance this appears strange: of all people, was not America founded by rugged individualists who established a new way of life still inspiring `` undeveloped '' societies abroad??
At night, when Mama would turn back the covers, she would have to take all the dolls off the bed and place them elsewhere for the night.
At this moment Mando came hurrying up to announce that the problem was solved and all Norton had to do was to sign a sheaf of papers.
Having hedged its bets in this way, PHS apparently decided it would be possible to make some sort of determination after all: `` At present radiation levels, and even at somewhat higher levels, the additional risk is slight and very few people will be affected ''.
At the slope's base coils of concertina stretched out of eye range like a wild tangle of children's hoops, stopped simultaneously, weirdly poised as if awaiting the magic of the child's touch to start them all rolling again.
At the same time, you have to face facts and realize that a man who's been in the Marine Corps all his life doesn't understand much about politics.
At the same time he watched carefully to see how one attached pegboards to stone walls, but Mr. Blatz was usually standing in his line of vision and it all seemed so simple that he didn't like to disclose his ignorance.
At the same time, we should recognize that the obstacles to change and the lack of cohesion and stability which characterize these countries may make them particularly prone to diversions and external adventures of all sorts.
At the central level the scrutin uninominal voting system was selected over some form of the scrutin de liste system, even though the latter had been recommended by Duverger and favored by all political parties.
At once the Jesuit pulls out all the stops.
At any rate, the substance of Eichmann's testimony was that all his actions flowed from his membership in the party and the SS, and though the Prosecutor did his utmost to prove actual personal hatred of Jews, his success on this score was doubtful and the anti-Semitic lesson weakened to that extent.
At each angle of its pitch a big skylight had been fitted into the roof and all these skylights were fitted with systems of multiple screens and shades.
At this moment, all he could think of was what he'd been forced to undergo.
At present all offenses must be taken to Sixth District Court for disposition.
At least 60 stations devote all of their time to reaching this audience in about half of the 50 states.
Those elegant `` At Home '' cards she sent out, now she could wear her pretty clothes again, and had the house all trimmed up, hadn't brought many callers in two whole months.
At present the doctor's main concern was in seeing to it that Japanese salvage firms were not permitted to operate on the hulks of warships sunk too close inshore, because the work involved setting off nerve-shattering blasts at all hours.
At least we'll eat, I thought grimly as I put all the food away.
At the same time, anthropologists urge, as part of their quest for scientific objectivity, cultural relativism, which has an influence on all the sub-fields of anthropology.
At first all these colonial churches were under the jurisdiction of the Bishop of London.
At twelve, he was accepted into Mikhail Botvinnik's prestigious chess school, though Botvinnik made the following remark about the young Karpov: " The boy does not have a clue about chess, and there's no future at all for him in this profession.
At and sectional
At first his literary activity was limited to sectional publications, and he addressed his public, now as editor and now as leading contributor, in the Monthly Repository, the Christian Reformer, the Prospective Review, the Westminster Review and the National Review.
At a time when sectional tensions were tearing the United States apart, stagecoaches provided regular transportation and communication between St. Louis, Missouri, in the Midwest along the Mississippi River, and San Francisco, California, in the West.
At the small scale ( within a township ) it is done by starting the sectional surveys ( township " subdivisons ") in the southeast corner and moving progressively toward the northwest corner.
At the " throat ", where the cross sectional area is a minimum, the gas velocity locally becomes sonic ( Mach number = 1. 0 ), a condition called choked flow.
At the end of the season, teams participate in a sectional tournament.
At and curvatures
* At elliptical points, both principal curvatures have the same sign, and the surface is locally convex.
* At hyperbolic points, the principal curvatures have opposite signs, and the surface will be locally saddle shaped.
* At parabolic points, one of the principal curvatures is zero.
At and are
`` At 200, 300, 400 feet under the water, when he must be paying very much attention, he will be thinking about what you are telling him.
At least a dozen men, some armed, are never far away from him.
At any rate, three men out of a six-man B-52 crew are required to copy down Wisman's go-to-war message.
At either end and in the center there are bays which contain nine greater alcoves as frescoed and capacious as church apses.
At what stage are social sciences then??
At least I should like them to know that I know these discounts are being made.
At Khrushchev's door, therefore, can be placed the primary blame but also at fault are those who permitted themselves to be intimidated.
At times, three ships a day from the Soviet bloc are unloading in Cuban ports.
At this point it should be painfully obvious that cities, being `` soft '', and the people within them are ideally suited to destruction by nuclear weapons.
At Cypress Gardens special bleachers are set up for photographers at water-ski shows and lovely models pose for pictures in garden settings.
At the moment, many of these are being pulled down.
At present, both the familiar cast acrylic and the newer extruded sheets are being used by sign manufacturers, with extruded now representing an estimated 10% of the total.
At some cities, this pick-up and delivery service is without additional charge, and, if you are budget-wise, when you are planning your itinerary, you will take advantage of these free delivery and collection stations in major cities within the larger European countries.
At one astronomical unit from the sun ( the Earth's distance ) the dust orbits are probably nearly circular.
At the present time we do not know by what biochemical mechanism TSH acts on the thyroid, but for bio-assay of the hormone there are a number of properties by which its activity may be estimated, including release of iodine from the thyroid, increase in thyroid weight, increase in mean height of the follicular cells and increase in the thyroidal uptake of Af.
At a third stage in the modernization process are such countries as India, Brazil, the Philippines, and Taiwan, which are ready and committed to move into the stage of self-sustaining growth.
At this time, however, there are signs that increased availability of mortgage credit will not act with the usual speed to stimulate a sharp rise in residential construction.
At the end of this pass, the table indicates which index words and electronic switches are not available for assignment to symbolic references.
At the conclusion of the washing, 8 liters of water at 90-degrees-F ( 32*0C. ) are automatically metered from the rinse reservoir to the washing tubs, 4 liters to each tub.
At this point the drains are readjusted so that the suds box drain will discharge directly into the waste line and the main tub drain is set at the 2-1/2 mark on the drain gauge.
At the beginning of the school year, the new students don't eat the cereal right away, but within a short time they are eating it voraciously.
At its most ecstatic moments, husband and wife are elevated far above worldly cares.
At the same time, there is a good deal of self-congratulation at attending a good college -- they are even inclined to exaggerate its not inconsiderable virtues -- and they express pleasure at the cozy in-group feeling that the college generates.
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